Update mute API usage to fix pops and consistency

Remove deprecated setStreamMute API and instead control volume of audio
track. Since we are controlling mute/unmute state of FM audio track, we
don't have to save/restore it for other audio applications.

CRs-Fixed: 966690
Change-Id: I242c63c3edd988ed4b85e631b857d0696935cb76
1 file changed
tree: 0599a3141a725f73dadc0116dcdabc386824a0b9
  1. fmapp/
  2. fmapp2/
  3. FMRecord/
  4. jni/
  5. libfm_jni/
  6. qcom/
  7. Android.mk