Handling Authentication Failure From the lower layer

Use case: DUT unable to do connect with all devices in
Multipairing case.

Steps:
1. pair with HS
2. disconnect HS.
3. reconnect HS from DUT.

Failure: Authentication failure occurred due to LMP
transaction collision DUT not deleting link key which
lead to unable to connect to device.

Root Cause: Not posting the Authentication failure
event to application layer, while removing the link-key.

Fix: Post the Authentication failure event to application
and removing the link-key.

Test: code compilation.

Change-Id: I079d8ce89c1fea66f0624127514cec8405bfdd3d