Android: Switch all activities to AppCompat-based Material themes, and use Support Library version of Floating Action Button.

Source/Android/app/src/main/res/drawable/oval_ripple_accent.xml

@@ -1,8 +0,0 @@
-<ripple xmlns:android="http://schemas.android.com/apk/res/android"
-        android:color="?android:colorControlHighlight">
-    <item>
-        <shape android:shape="oval">
-            <solid android:color="?android:colorAccent"/>
-        </shape>
-    </item>
-</ripple>