Revert "libstagefright: Fix crash during seek"

This reverts commit 2a47745e3c82bf5a088a19daa6b99f27a789c3b2.

Change-Id: I4397a0f32b4773b0073a00c12be13057b9a6d2d0
Merge "Revert "libstagefright: Fix crash during seek"" into android-4.4
Merge remote-tracking branch 'omni/android-4.4' into android-4.4