Adapter: registerBluetoothConnection permissions

The permissions are properly enforced but this is being done behind the
oneway binder call.
A normal app developer will struggle in finding out the app is missing
permissions. Adding a synchronous enforcement will help for that

Bug: 339585576
Bug: 341846395
Flag: Exempt fixing test flakiness
Test: atest CtsBluetoothTestCases
Change-Id: Iae6e356381d63771978ea9ad6acfafb5dab7184a