Hearing Aid: Add clear conn_id and close ctrl UIPC when BT turn off

* On some condition, BT will stay on BLE_ON state when BT turn off. For
the case, Hearing Aid should be correctly disconnected and ctrl UIPC
close until next BT turn on.
* This CL add clear BtaGATTQueue and Close GATTC to make sure Queue
clean and HA enter disconnected state. And don't restart ctrl UIPC if
HearingAid is shutdown.

Bug: 118803637
Test: make, BT off/on when play A2DP and an app registered.
Change-Id: I1c52307637ee6b34222de9308dcfe1392ad170e8