Add support for ICS audio blobs

Enable with the ICS_AUDIO_BLOB CFLAG

Change-Id: Ie174d5997202b8931c1f11db62b6ec2e377f096a
More ifdefs for ICS audio blobs support

Change-Id: I1e01db9b7cb2da45a3e52aafe7574b689a9c57f4
Added ifndef ICS_AUDIO_BLOB around non-existent functions (3/3)

For older audio blobs where is_source_active and is_stream_active_remotely
doesn't exist, receiving a notification and dumpsys crashes the audio service.

Change-Id: I554f00ba7f171d2ea91627cae2281623383b3ca7