QCMetadata: add keys for FLAC meta data

Add FLAC meta data specific keys.

Change-Id: I85f34d01ad4b403e236a5fc2ebf054eb383abbde
mm-video: Use multimedia heap on MSM7x30 (720p) too.

Change-Id: I8c7997a1fdd9490cbec9729b07a50f40b1c07c2b