Fix system crash when unpair app

No need to restartBleScan after each unbind serviceSelector
restart ble scan after update the associations
Also, move unbind serviceSelector before the permission revoke since
permission revoking caused app crashed.

Fix: 190506983
Test: Manual test
Change-Id: Icc2a19f56295be4000155a4ccd6650a30e7c9b66
1 file changed