Add HFP to BluetoothAudioSession am: aa70c11126

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2806338

Change-Id: I9748302968150c39c77c3c3b0095733e6a00d7ea
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>