[android] Native RTL support in Android 4.2

[android] Native RTL support in Android 4.2

1. add android:supportsRtl="true" to the <application> element in your manifest file.
2. Change all of your app's "left/right" layout properties to new "start/end" equivalents.

- https://android-developers.googleblog.com/2013/03/native-rtl-support-in-android-42.html