kmssdpagent: Set id and index for all medias handlers
kmssdpagent: Set id and index for all medias handlers

Change-Id: I56f244ee8b9c3afd918b721ff183a44d2234c2d2

Kurento/kms-core,ESTOS/kms-core,Kurento/kms-core,ESTOS/kms-core,Kurento/kms-core,ESTOS/kms-core,Kurento/kms-core,ESTOS/kms-core