omx: Add nBitsPerSample parameter for FLAC

 * Necessary to convey this information from the extractor.

Change-Id: Ic6f689df9d5f840280bf0410021f6d6ee04a48d5
native: Make setting the buffers size conditional to qualcomm hardware

This is a partial ifdef of CAF commit d6eecf50919312c1dd778c5742de72bb98f98f1a.

Some devices might have proprietary bits that link against libgui/libui components
and are not expecting the ABI mismatch introduced in that commit.

Change-Id: I0670990fcb903ee750d4d2925175b9588cf35f45
Merge pull request #2 from SlimRoms/kk4.4-caf

bring up to date