kmswebrtcendpoint: fix get_video_recv_info

It must return FALSE if data has not been taken.

Change-Id: I63f5816b8a69732430ab3dd2084be4c8254ad15d
kmswebrtcendpoint: use on-new-ssrc instead of on-ssrc-sdes

This is needed for working for recvonly clients.

Change-Id: Ieb76261ea553ff40a5e365f75d8829b5ff69e4bf
kmswebrtcendpoint: change REMB_SEND_ to REMB_

Change-Id: I13f93855c3d16223f45f96f7c881178b641c6bf1
kmswebrtcendpoint: use kms_utils_get_time_nsecs

Change-Id: If3ca10881f42039880348871081f377f81a4d640
kmswebrtcendpoint: get local ssrcs into update_sdp_media

Change-Id: I0b2dda11434cd59e5db01cdef2368b45392d56b9
kmswebrtcendpoint: process received REMB packets

Change-Id: I179e31d17eaadc09e2765e6addd1891d6d2f5ace
kmswebrtcendpoint: manage remote bitrate from received REMB

Change-Id: Id36ca555029e61a2826ca389189c7672211b11d2
kmswebrtcendpoint: use RembEventManager to set the max local REMB

Change-Id: I733e8a7508bcf7dc79d64800fa47c02448449aad