Bluetooth: Remove device from trust device list on unpairing

This change will remove the unpaired devce from trusted
device list of adapters  so that authorisation request comes
again when remote tries to connect any application
with the server.

Change-Id: I3cb8576ddeeb25ef50c50e2efc052b3b7b52b66d
CRs-Fixed: 545685
(cherry picked from commit ac04edc576295a4058d85d302c1c4cea01994aaa)
(cherry picked from commit bf43ab9659db0934dee745f2b12f8ea31ed30592)
(cherry picked from commit 291859691ae8c56face2763be7d954a0f36177f3)