add fm radio support

Change-Id: I2a57df25413b8f1f593f347797a85c3c2a819af8
libaudio: update based on jb_rel_2.0.3

AU_LINUX_ANDROID_JB_REL_2.0.3.04.01.02.021.138 +
-updates for audio device API 2.0
-update audio policy manager for mr1

Change-Id: I312f1c2fcf93fab7ce8ac499fcf66982ef9cc8e1
libaudio: cleanup & use kernel headers

Change-Id: Ie60eb4a1691e5925d70c609f458f437c7f7f0eaf