Send signal to indicate if app is accepting incoming connection on listen...

Send signal to indicate if app is accepting incoming connection on listen socket am: 88ba5e07 am: fde86181

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/3349375



Change-Id: I5a1bb44fd9a9a421d15bdefe4585083d61d1377a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>