Add OMX_AUDIO_CodingAPE and OMX_AUDIO_CodingDTS

Copied from the stagefright-plugins project.

add HEVC decoder and cleanup

Change-Id: I16342228014320161a22302a3c14df7725556cd2
omx: Add nBitsPerSample parameter for FLAC

 * Necessary to convey this information from the extractor.

Change-Id: Ic6f689df9d5f840280bf0410021f6d6ee04a48d5
Add QCOM_BSP_LEGACY for setBuffersSize feature

 * This is deprecated and causes breakage on 8974 L BSPs.

Change-Id: Id095d9c88a67ed2d46086c6089598166823b6625