stagefright-plugins: Fix port reset problem
stagefright-plugins: Fix port reset problem

onReset does not clean the ffmpeg status
causing left-over to the next stream decoded.
Fix CTS testCodecResetsMpeg4WithSurface and
testCodecResetsMpeg4WithoutSurface under
package android.media.cts.DecoderTest

FEIJ-88

Change-Id: Ic185852948a946d42feed464b7f690a6b809dc58

DirtyUnicorns/android_external_stagefright-plugins,AOSP-CAF/platform_external_stagefright-plugins,Evervolv/android_external_stagefright-plugins,DirtyUnicorns/android_external_stagefright-plugins,Evervolv/android_external_stagefright-plugins,TeamExodus/external_stagefright-plugins,TeamExodus/external_stagefright-plugins,PAC-ROM/android_external_stagefright-plugins,PAC-ROM/android_external_stagefright-plugins,SlimRoms/android_external_stagefright-plugins,SlimRoms/android_external_stagefright-plugins,AOSP-CAF/platform_external_stagefright-plugins