FM: lower FM volume when AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK received

lower FM Volume in case of AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK and
restore the original volume level when AUDIOFOCUS_GAIN received.

CRs-Fixed: 2469991
Change-Id: Ie5b55999a097f1944552d06009ee012f4e1fb219
1 file changed
tree: 8d920946292eadb0baac04275357a914a7f7e9bf
  1. fm_hci/
  2. fmapp2/
  3. helium/
  4. jni/
  5. qcom/
  6. Android.bp
  7. Android.mk