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

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



Change-Id: Icb5f1321691bbfd3bbd330ba894506888c32a8d1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>