Delete v21 resources (#864)

uhabits-android/src/main/res/drawable/selected_box_amoled.xml

@@ -1,24 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-  ~ Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
-  ~
-  ~ This file is part of Loop Habit Tracker.
-  ~
-  ~ Loop Habit Tracker is free software: you can redistribute it and/or modify
-  ~ it under the terms of the GNU General Public License as published by the
-  ~ Free Software Foundation, either version 3 of the License, or (at your
-  ~ option) any later version.
-  ~
-  ~ Loop Habit Tracker is distributed in the hope that it will be useful, but
-  ~ WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-  ~ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-  ~ more details.
-  ~
-  ~ You should have received a copy of the GNU General Public License along
-  ~ with this program. If not, see <http://www.gnu.org/licenses/>.
-  -->
-
-<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
-    <solid android:color="@color/black" />
-    <stroke android:width="2dip" android:color="@color/grey_500"/>
-</shape>

uhabits-android/src/main/res/drawable/selected_box_dark.xml

@@ -1,24 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-  ~ Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
-  ~
-  ~ This file is part of Loop Habit Tracker.
-  ~
-  ~ Loop Habit Tracker is free software: you can redistribute it and/or modify
-  ~ it under the terms of the GNU General Public License as published by the
-  ~ Free Software Foundation, either version 3 of the License, or (at your
-  ~ option) any later version.
-  ~
-  ~ Loop Habit Tracker is distributed in the hope that it will be useful, but
-  ~ WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-  ~ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-  ~ more details.
-  ~
-  ~ You should have received a copy of the GNU General Public License along
-  ~ with this program. If not, see <http://www.gnu.org/licenses/>.
-  -->
-
-<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
-    <solid android:color="@color/grey_800" />
-    <stroke android:width="2dip" android:color="@color/grey_500"/>
-</shape>

uhabits-android/src/main/res/drawable/selected_box_light.xml

@@ -1,24 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-  ~ Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
-  ~
-  ~ This file is part of Loop Habit Tracker.
-  ~
-  ~ Loop Habit Tracker is free software: you can redistribute it and/or modify
-  ~ it under the terms of the GNU General Public License as published by the
-  ~ Free Software Foundation, either version 3 of the License, or (at your
-  ~ option) any later version.
-  ~
-  ~ Loop Habit Tracker is distributed in the hope that it will be useful, but
-  ~ WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-  ~ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-  ~ more details.
-  ~
-  ~ You should have received a copy of the GNU General Public License along
-  ~ with this program. If not, see <http://www.gnu.org/licenses/>.
-  -->
-
-<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
-    <solid android:color="@color/grey_100" />
-    <stroke android:width="2dip" android:color="@color/grey_500"/>
-</shape>

uhabits-android/src/main/res/values-v21/styles.xml

@@ -1,32 +0,0 @@
-<!--
-  ~ Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
-  ~
-  ~ This file is part of Loop Habit Tracker.
-  ~
-  ~ Loop Habit Tracker is free software: you can redistribute it and/or modify
-  ~ it under the terms of the GNU General Public License as published by the
-  ~ Free Software Foundation, either version 3 of the License, or (at your
-  ~ option) any later version.
-  ~
-  ~ Loop Habit Tracker is distributed in the hope that it will be useful, but
-  ~ WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-  ~ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-  ~ more details.
-  ~
-  ~ You should have received a copy of the GNU General Public License along
-  ~ with this program. If not, see <http://www.gnu.org/licenses/>.
-  -->
-
-<resources>
-    <style name="Card" parent="CardCommon">
-        <item name="android:elevation">1dp</item>
-        <item name="android:background">?attr/cardBgColor</item>
-    </style>
-
-    <style name="About.Item.Clickable" parent="About.Item">
-        <item name="android:paddingBottom">12dp</item>
-        <item name="android:paddingTop">12dp</item>
-        <item name="android:background">@drawable/ripple_transparent</item>
-    </style>
-
-</resources>

uhabits-android/src/main/res/values/styles.xml

@@ -52,7 +52,7 @@
         <item name="palette">@array/lightPalette</item>
         <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item>
         <item name="scrollableRecyclerViewStyle">@style/ScrollableRecyclerViewStyle</item>
-        <item name="selectedBackground">@drawable/selected_box_light</item>
+        <item name="selectedBackground">@drawable/selected_box</item>
         <item name="toolbarPopupTheme">@style/ThemeOverlay.AppCompat.Light</item>
         <item name="useHabitColorAsPrimary">true</item>
         <item name="widgetBackgroundAlpha">1</item>
@@ -93,7 +93,7 @@
         <item name="popupMenuBackground">@color/black</item>
         <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item>
         <item name="scrollableRecyclerViewStyle">@style/ScrollableRecyclerViewStyle</item>
-        <item name="selectedBackground">@drawable/selected_box_dark</item>
+        <item name="selectedBackground">@drawable/selected_box</item>
         <item name="textColorAlertDialogListItem">@color/grey_100</item>
         <item name="toolbarPopupTheme">@style/ThemeOverlay.AppCompat</item>
         <item name="useHabitColorAsPrimary">false</item>
@@ -120,7 +120,7 @@
         <item name="contrast60">@color/grey_700</item>
         <item name="contrast80">@color/grey_700</item>
         <item name="contrast100">@color/grey_200</item>
-        <item name="selectedBackground">@drawable/selected_box_amoled</item>
+        <item name="selectedBackground">@drawable/selected_box</item>
         <item name="textColorAlertDialogListItem">@color/grey_100</item>
         <item name="windowBackgroundColor">@color/black</item>
     </style>
@@ -168,6 +168,8 @@
 
     <style name="Card" parent="CardCommon">
         <item name="android:layout_marginBottom">1dp</item>
+        <item name="android:elevation">1dp</item>
+        <item name="android:background">?attr/cardBgColor</item>
     </style>
 
     <style name="CardHeader">
@@ -190,6 +192,7 @@
     <style name="About.Item.Clickable">
         <item name="android:paddingBottom">12dp</item>
         <item name="android:paddingTop">12dp</item>
+        <item name="android:background">@drawable/ripple_transparent</item>
     </style>
 
     <style name="Toolbar">