Fix BT connection failures

When HFP connection failed establishing between phone and watch, it can't
recover RFCOMM status which causes that HFP connection will not be made
unless BT radio goes off and comes back on. RFCOMM and HFP both trying to
open RFCOMM control channel at nearly same time, at some point, there's
a possibility that SABM packet didn't reach out to BT controller to connect
to phone from watch with HFP while phone tries to connect to watch with
AW RFCOMM.

This will take care of pending SABM packet to reach out to controller
properly so that RFCOMM status will not be messed.

Bug: 24285000
Bug: 25579482
Bug: 25579423
Bug: 25578997
Change-Id: Icc26b86c644ebd8d1c12a2fb4e94d04ba16cc2dd