HidHostTest: Use Mockito to wait for events instead of Future

* This helps get rid of unncessary broadcast receiver and listener
  classes
* Before this change, there is no gurantee that A2DP, HFP, and HID_HOST
  service proxy will be connected on time during setUp() function. This
  change ensures that we always wait for service proxy connections
* Before this change, some times the Future is created after calling the
  method under test, if the future is completed before the Future is
  completed, then we will wait forever for the future. This change makes
  sure this race condition won't happen

* Added EnableBluetoothRule to toggle Bluetooth at each test, adding
  about 2 second delay to each test, but it makes the test much more
  stable

Test: atest HidHostTest
Flag: TEST_ONLY
Bug: 363974008
Change-Id: I9e9a198bdccd1510f963a8bb85df78b5d52f54e7