FM: add null check for BluetoothAdapter instance

Issue : BluetoothAdapter object is null and it causes FM App termination.
Add null check for BluetoothAdapter instance.

Change-Id: I0c4053b1f0b5bec5ca9f71b8a915670e8922bec5
1 file changed
tree: b0fc0c20d394fc87f740ab259829fbb6062fc9d6
  1. fm_hci/
  2. fmapp2/
  3. helium/
  4. jni/
  5. qcom/