hal: add support to offload VORBIS, ALAC formats

Send ALAC and APE specific data to DSP as part of the metadata
to support playback of ALAC and APE clips in offload mode

Force vorbis offload run in transcoded bit stream mode.

Also move parsing of WMA and FLAC metadata to audio_extn.c
from audio_hw.c.

Change-Id: Ideccadff93d4c06e649cd535b8870e45ba26eaea