CapabilityExchangeEventListener/RcsCapabilityExchangeImplBase to have the...

CapabilityExchangeEventListener/RcsCapabilityExchangeImplBase to have the default implementation of the new method call the old version of the method

Bug: b/266263188
Test: atest CtsTelephonyTestCases:ImsServiceTest, CtsTelephonyTestCases:RcsUceAdapterTest
Change-Id: I07590fbcd39f251baedc6fc2cf8bee9a6aa96594