Remove stored link key for temporarily paired devices

Problem: Device shows up in paired list during just work pairing

1. Create a connection from DUT to remote.
2. Remove the link key in remote.
3. Send a file from remote to DUT.
4. Turn OFF BT. Turn ON.

Failure: Device should not move to paired list after BT on/off
as device removed from UI during just work pairing

Root cause: remote device is not removed from btif but
its removed from UI during justworks pairing

Fix: remote device is removed from btif during justworks
pairing to sync up UI and btif paired list

Bug: 19417758
Change-Id: I73de0a94c4f7ada644d258790a9e3e4bf11fc4e5