Merge "Replacing getActiveDevice by btAdapter.getActiveDevices()" am: fa9d5b2e03 am: 5d85fee641 am: c02965ec5d

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1967621

Change-Id: I3886121ff9f1f0ea67ff763301305dd898a159a4