Do not ignore runID in SRTTrack

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