Merge "Adds utility method for the dual mode audio system property" am:...

Merge "Adds utility method for the dual mode audio system property" am: 5bd2c807 am: b2667946 am: c94322d5 am: 59d303a9

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2515979



Change-Id: I3870e3c69aabb9a052421baca97c5da415e486b0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>