Update ROM Control icons, with cleaner versions and proper transparency.

Patch Set 1: New installer icon, fixed sizing on nav ring, and cleaned up
quick settings.

Signed-off-by: Kyle Teague <kwesley1020@gmail.com>
Change-Id: Ied8173b95b9db8262bdec25a95d1db2000858c0d

Conflicts:
	res/drawable-mdpi/ic_rom_control_quick_settings.png
	res/drawable-xhdpi/ic_rom_control_navigation_ring.png
	res/drawable-xhdpi/ic_rom_control_quick_settings.png