jf: add missing ISO modes

Change-Id: Iac89ed83637d21853b043e27975c292d31217a28
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
Signed-off-by: Brandon McAnsh <brandon.mcansh@gmail.com>