Set mRunID parameter when adding cue to the list because of
mRunID value depends if past cues are removed from the list
during active cues update. Keeping past cues on the list makes
it possible to find and set proper active cue after seeking
backward.
Bug: 68034458
Test: play video with srt subtitle and seek
Change-Id: I8439840d5925607127fadc1082913d9d91f688af
b5f801f458