FM Radio: Add support for FM Radio in Android

Creating interface and framework for using FM Radio
RX and TX from different vendors.

Change-Id: I19df764d242a18198618614b6486d4b3ee36396b
Signed-off-by: Benn Porscke <benn.porscke@stericsson.com>
Merge remote-tracking branch 'cm/jellybean' into jb-otter

Conflicts:
	include/system/audio.h