Revert "Revert "Set minimum scaling frequency to 368 MHz""

 * Going below this causes random blue screen flashing.
   Weird issue indeed.

This reverts commit ea95fc5a41fcac2985d46e28924cc90d86f52c45.
Revert "Revert "Add hardware MP3 decoder""

 * The problem with blue flashing when playing music was
   caused by too low minimum cpu frequency.

This reverts commit b6c3e345dce9772df3785af4013dc57c005e9371.
Remove USE_CAMERA_STUB

 * Moved to vendor