overlay: revert dim the screen to sleep
Enable ZSL

Move overlay from Gallery2 to Camera2, and remove all the options except
enable zsl since the rest don't exist (anymore/yet)

Change-Id: Ia80504f25a2c2f18be93d0c9cb07fd1af716e818
jf: WiFI is still a module

Change-Id: Ifcce768dae9febffa0a34bee078fb3d6aa2bc6c0
jf: Add QCOM flags

Change-Id: Idaefaac81df8a7f6fa285e0d0a2af7135e5d74f9
add MahdiCenter overlay for download link