SystemServer: path to a reliable turn off

Add extra time to register bluetooth death and increase the time after
the bluetooth is killed from the binder thread
Also add a small sleep after death reception to let more time to the
ActivityManager to register Bluetooth death

Bug: 356931756
Bug: 361850050
Test: atest CtsBluetoothTestCases
Change-Id: Id08763bae16ab5044f29501e9e98de14840fa5c8