Update compile and target SDK to 33 (Android 13)

Most of the breaking changes here are the `MotionEvent` parameters
on `GestureDetector.OnGestureListener` interface are now non-nullable.

I've updated the implementing classes accordingly

uhabits-android/build.gradle.kts

@@ -32,13 +32,13 @@ tasks.compileLint {
 
 android {
 
-    compileSdk = 32
+    compileSdk = 33
 
     defaultConfig {
         versionCode = 20101
         versionName = "2.1.1"
         minSdk = 28
-        targetSdk = 31
+        targetSdk = 33
         applicationId = "org.isoron.uhabits"
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }

uhabits-android/src/androidTest/java/org/isoron/uhabits/activities/common/views/FrequencyChartTest.kt

@@ -18,6 +18,7 @@
  */
 package org.isoron.uhabits.activities.common.views
 
+import android.view.MotionEvent
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.filters.MediumTest
 import org.isoron.uhabits.BaseViewTest
@@ -52,7 +53,12 @@ class FrequencyChartTest : BaseViewTest() {
     @Test
     @Throws(Throwable::class)
     fun testRender_withDataOffset() {
-        view.onScroll(null, null, -dpToPixels(150), 0f)
+        view.onScroll(
+            MotionEvent.obtain(0L, 0L, MotionEvent.ACTION_SCROLL, 0f, 0f, 0),
+            MotionEvent.obtain(0L, 0L, MotionEvent.ACTION_SCROLL, 0f, 0f, 0),
+            -dpToPixels(150),
+            0f
+        )
         view.invalidate()
         assertRenders(view, BASE_PATH + "renderDataOffset.png")
     }

uhabits-android/src/androidTest/java/org/isoron/uhabits/activities/common/views/ScoreChartTest.kt

@@ -18,6 +18,7 @@
  */
 package org.isoron.uhabits.activities.common.views
 
+import android.view.MotionEvent
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.filters.MediumTest
 import org.isoron.uhabits.BaseViewTest
@@ -63,7 +64,12 @@ class ScoreChartTest : BaseViewTest() {
     @Test
     @Throws(Throwable::class)
     fun testRender_withDataOffset() {
-        view.onScroll(null, null, -dpToPixels(150), 0f)
+        view.onScroll(
+            MotionEvent.obtain(0L, 0L, MotionEvent.ACTION_SCROLL, 0f, 0f, 0),
+            MotionEvent.obtain(0L, 0L, MotionEvent.ACTION_SCROLL, 0f, 0f, 0),
+            -dpToPixels(150),
+            0f
+        )
         view.invalidate()
         assertRenders(view, BASE_PATH + "renderDataOffset.png")
     }

uhabits-android/src/main/java/org/isoron/platform/gui/AndroidDataView.kt

@@ -44,21 +44,21 @@ class AndroidDataView(
         addUpdateListener(this@AndroidDataView)
     }
 
-    override fun onTouchEvent(event: MotionEvent?) = detector.onTouchEvent(event)
+    override fun onTouchEvent(event: MotionEvent) = detector.onTouchEvent(event)
-    override fun onDown(e: MotionEvent?) = true
+    override fun onDown(e: MotionEvent) = true
-    override fun onShowPress(e: MotionEvent?) = Unit
+    override fun onShowPress(e: MotionEvent) = Unit
 
-    override fun onSingleTapUp(e: MotionEvent?): Boolean {
+    override fun onSingleTapUp(e: MotionEvent): Boolean {
         return handleClick(e, true)
     }
 
-    override fun onLongPress(e: MotionEvent?) {
+    override fun onLongPress(e: MotionEvent) {
         handleClick(e)
     }
 
     override fun onScroll(
-        e1: MotionEvent?,
+        e1: MotionEvent,
-        e2: MotionEvent?,
+        e2: MotionEvent,
         dx: Float,
         dy: Float,
     ): Boolean {
@@ -79,8 +79,8 @@ class AndroidDataView(
     }
 
     override fun onFling(
-        e1: MotionEvent?,
+        e1: MotionEvent,
-        e2: MotionEvent?,
+        e2: MotionEvent,
         velocityX: Float,
         velocityY: Float,
     ): Boolean {
@@ -100,7 +100,7 @@ class AndroidDataView(
         return false
     }
 
-    override fun onAnimationUpdate(animation: ValueAnimator?) {
+    override fun onAnimationUpdate(animation: ValueAnimator) {
         if (!scroller.isFinished) {
             scroller.computeScrollOffset()
             updateDataOffset()

uhabits-android/src/main/java/org/isoron/uhabits/activities/common/views/ScrollableChart.kt

@@ -116,7 +116,7 @@ abstract class ScrollableChart : View, GestureDetector.OnGestureListener, Animat
         return BundleSavedState(superState, bundle)
     }
 
-    override fun onScroll(e1: MotionEvent?, e2: MotionEvent?, dx: Float, dy: Float): Boolean {
+    override fun onScroll(e1: MotionEvent, e2: MotionEvent, dx: Float, dy: Float): Boolean {
         var dx = dx
         if (scrollerBucketSize == 0) return false
         if (abs(dx) > abs(dy)) {