Update the Bluetooth Active Device state in the Device Manager

The Bluetooth Active Device state should be updated for all
CachedBluetoothDevice entries.
This should be done inside CachedBluetoothDeviceManager in SettingsLib
instead of BluetoothDeviceUpdater in the Settings app.

Bug: 72316092
Test: Manual - two headsets and switching the active device
Change-Id: If379bb0853dcd78385430cf14192e9adfae4ecd0