platform: Remove mapping of android.permission.CAMERA to camera group

This mapping introduces security risk where any app with android.
permission.CAMERA can open camera driver directly without going
through mediaserver.

CRs-Fixed: 448868
Change-Id: Ic16880cfac0bc85a3e753ccd3261bfc455b02d1a
Correct executable bit for source files

Many media files and source code files were marked as executable in Git.
Remove those.

Also a shell script and python script were not marked as executable.

Change-Id: Ieb51bafb46c895a21d2e83696f5a901ba752b2c5
Signed-off-by: Chirayu Desai <cdesai@cyanogenmod.org>
Squash navigation bar cm commits

- Fix google now animation
- Fix derp
- Hide navigation ring if no targets are configured.