splitoff to device specific and msm8226-common

Change-Id: I98bd45f9cb8a58e93a41f53c423193dd904c3446
set USE_CAMERA_STUB := true

Change-Id: I9d358359d9e840cd6bb6cfab438384fa20334fcf
external sd

Change-Id: I435faf1911745db6580088c879967ed77ab4fee1