GF-41734 Defect Fixed Video Feedback error when changed from fastforward to play and again fastforward

Issue: Feedback gives wrong playbackRate in message when changed from
FastForward to play/pause (saw while solving GF-41734 issue on TV which
required to change from FF to Play) and again FastForward.
It doesn't refreshes playbackRate Index gives next playbackRate from the
playbackRateArray.
Fixes:
Updated speedIndex to 0 in when play and pause are fired in video
(video.js) to give correct playbackRate for the next time user do
FF/Rewind.

Enyo-DCO-1.1-Signed-off-by: Anugrah Saxena <anugrah.saxena@lge.com>
Merge pull request #547 from enyojs/GF-41734--anugrahsaxena

GF-41734 Defect Fixed Video Feedback error when changed from fastforward...

Reviewed-By: Ben Combee (ben.combee@lge.com)