FM Rx: FM Radio support in Android Audio framework 

Added the FM Rx radio changes for opening the capture path and playback path for FM Rx device Ported from ICS to JB.

Adapted from:
Change-Id: Ibbaff3d9b0e7ada320ce60b55e07b25de95df861 Signed-off-by: Shitiz Kumar <shitiz_kumar@ti.com>