QCMetadata: add keys for FLAC meta data

Add FLAC meta data specific keys.

Change-Id: I85f34d01ad4b403e236a5fc2ebf054eb383abbde
media: Move sample format tag to framework

Change-Id: Id3081ce8d3079e07343f99463501faa45c5087bf
Merge branch 'cm-11.0' of git://github.com/CyanogenMod/android_hardware_qcom_media into cm-11.0