Add mockitokotlin dependency to androidTest

uhabits-android/build.gradle.kts

@@ -85,6 +85,7 @@ dependencies {
     androidTestImplementation("androidx.test.ext:junit:1.1.2")
     androidTestImplementation("androidx.test.uiautomator:uiautomator:2.2.0")
     androidTestImplementation("androidx.test:rules:1.3.0")
+    androidTestImplementation("com.nhaarman.mockitokotlin2:mockito-kotlin:2.2.0")
     compileOnly("javax.annotation:jsr250-api:1.0")
     coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:1.1.1")
     implementation("com.github.paolorotolo:appintro:3.4.0")