[Hide DCK devices] Implementation to determine check is a Bluetooth device is exclusively managed.

A Bluetooth device will only be determined to be exclusively managed if it has allowed exclusive manager and manager package is installed.

Test: atest: com.android.settingslib.bluetooth.BluetoothUtilsTest
Bug: 322285078
Change-Id: I95c4c762910cb72ee5fa78420794f747b50f5ed4
2 files changed