Theme chooser support.

Change-Id: I2afd8dfc6ffcd827e3f3ac803b6f4719441473d9
Signed-off-by: iceandfire <arhamjamal@gmail.com>

Conflicts:
	res/values/strings.xml

Conflicts:
	res/values/strings.xml

Conflicts:
	res/values/custom_strings.xml