tests/check: add an rtpsession unit test to verify all RBs are included in all SRs, roundrobin

This test checks that when we have multiple internal sender sources
in rtpsession, SRs contain RBs for every other sender source, and that
they are included roundrobin when they exceed ST_RTCP_MAX_RB_COUNT,
which is the max number of RBs that can fit in a SR.
1 file changed