Add support for Android 2.3+

There have been plenty of ppl involved in creating this version.
I don't wanna mention names as I'm sure I'd forget someone so I
just tell where help has been done:
- The partial android versions done by various ppl
- Testing on different android devices
- reviewing code (especially the in core changes)
- testing controls
- reviewing texts

A big thank you to everyone helping this to be completed!

build/android/res/values/styles.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+	<style name="Theme.Transparent" parent="android:Theme">
+		<item name="android:windowIsTranslucent">true</item>
+		<item name="android:windowBackground">@android:color/transparent</item>
+		<item name="android:windowContentOverlay">@null</item>
+		<item name="android:windowNoTitle">true</item>
+		<item name="android:windowIsFloating">true</item>
+		<item name="android:backgroundDimEnabled">false</item>
+	</style>
+</resources>