HFP: remove the dropped HF connection request message in btif connect_queue...

HFP: remove the dropped HF connection request message in btif connect_queue and advance to the next scheduled connection request.

* hf connect-request message does not be handled in btif connect_queue when remote headset has already reconnected hfp, but it did not be removed, either.
it will make subsequent connecting request messsages blocked in btif connect_queue and never be handled.
* Add unit test for btif_profile_queue to verify the case when connect_cb() returns non BT_STATUS_SUCCESS

Bug: 140846154
Test: Connected 2 headset (HS1, HS2) -> Disable Bluetooth and Turn Off
HS2 ->  Enable Bluetooth and Turn On HS2 -> Check hfp and a2dp profole
state after HS2 connected

Change-Id: I503fba1975054efe3180ecf1f7daa917fb6edf99