Replacing getActiveDevice by btAdapter.getActiveDevices() am: fb43b1d232 am: 3271d6d1b4 am: 524990d8b9 am: 2540326b6d

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Test/connectivity/+/1967501

Change-Id: I764f30b52740baef04f1cd8410a546cfd6c903f9