Add default implementation for Bluetooth Socket Offload am: caec34bdce

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3308495

Change-Id: If16ae1be00d48ddf6ff5cc0ce5307f1f7700d402
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>