video_dec: Squashed MPEG2 updates

video_dec: Squashed MPEG2 updates

Squash of the following commits:

video_dec: Add buffer index reset scheme.

Add buffer index reset scheme when the Dynamic Resolution Change with
dynamic DPB Change working.
Backported-from: hardware/samsung_sli/exynos5
Change-Id: Id0bd2b8f1271c240a7280a7e3f39fdc802a7c339
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
----------------------------------------------------------

video_dec: Add ThumbnailMode decoding to h264

Extension name:
 - EXYNOS_INDEX_PARAM_ENABLE_THUMBNAIL "OMX.SEC.index.enableThumbnailMode"
Backported-from: hardware/samsung_slsi/exynos5
Change-Id: I630cfa54de361dccfde1f8b56e7b8ba2f534654f
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Change-Id: Icd2fa453c608144ac4cd908e1abab074bd100e87

----------------------------------------------------------

video_dec: Fix for dynamic resolution change timing issue.

Backported-from: hardware/samsung_slsi/exynos5
Change-Id: I8bba464d9a7eaa43511d0324badba711ea1cc931
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
----------------------------------------------------------

video_dec: Fix issue where EOS Flag is returned multiple times

There is a bug that EOS Flag is returned too many times in special
cases.
Backported-from: hardware/samsung_slsi/exynos5
Change-Id: I2a7e83ce4a3da56585255fb9b3884262056cc24d
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Change-Id: Icd2fa453c608144ac4cd908e1abab074bd100e87