kmsrtpendpoint: fix BaseRtp inheritance using RTP connections
kmsrtpendpoint: fix BaseRtp inheritance using RTP connections

Change-Id: I9fe1513dd9f998e4f8567fe22a0cfadef2371117

shelsonjava/kms-elements,TribeMedia/kms-elements,shelsonjava/kms-elements,TribeMedia/kms-elements,shelsonjava/kms-elements,TribeMedia/kms-elements