Fix queryRemoteConnectionServices for call provider + manager

When a PhoneAccount is registered as both call provider and
connection manager (shouldn't normally be the case), we were
not calling back into the ConnectionService for
queryRemoteConnectionService onResult callback.

Test: atest TelecomUnitTests; atest CtsTelecomTestCases
Change-Id: Idc21e567d07263714b101bf3720c118a08758361