stagefright-plugins: Fix certain HEVC file cannot playback
stagefright-plugins: Fix certain HEVC file cannot playback

Add checking for HEVC streaming is in hvcC format or not,
before we decided to do convertion to annex-b format.

Change-Id: If268bbf2631ef51694298d04a3ec89e5e68f37a9

TeamExodus/external_stagefright-plugins,TeamExodus/external_stagefright-plugins