stagefright: Clear mNoMoreOutputData flag during seeking

For some 3rd party players, stop won't be called when playing
to the end. If seeking happens after that, we need to clear
this flag to make it be ready for subsequence data flow.

Change-Id: I9b2d18d03225420a45821ba7536cdc91d52b1312
CRs-Fixed: 755988
Track volume should be maintained even if track is restored

If track is restored when it set its volume to a non-unity value (such as mute),
the volume was forced to unity again.  Now, the previous volume is restored.

Bug: 18570664
Change-Id: I79f34c6c7d6f535baba813fd3b8ba8e55cac8ad7
libstagefright: back off exynos4 hacks

Change-Id: I953f502171bc98854b5d59165057c57b3c65cdaa
libstagefright: align YV12 for software codecs on exynos4

YV12 chroma stide should be aligned to 16 according to the
android framework. But, GSC & Mali couldn't accept a seperate
stride for U & V components. They just use Y_stride/2 as a
UV Stride.

Change-Id: Ibeeb3439ee10a4666420e5fa34ff0a6d6ea7c003
libstagefright: fix YV12 stride for software codecs on exynos4

Change-Id: I3612899d2bffa474eb6447788858911757a7f45d
omx: exynos4: bring inline with jellybean

Change-Id: Ic275fd30a721f8161dcc44c2706b86ab5ea213ba