Merge "Revert "[LE unicast] The isBusy state should involve the state of sub...

Merge "Revert "[LE unicast] The isBusy state should involve the state of sub device"" into tm-qpr-dev am: 8a283d04 am: 3e78c2ab

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20269876



Change-Id: I0c0b678e8c2dbe66509c820d319968d47afcd7bd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>