Revert "libstagefright: Keep LOOPING/AUTO_LOOPING flag during teardown"

This reverts commit 9a59488dae2c70ab0c55cda7721824ca1a71340d.

Change-Id: I9af6fe9f2086cfe17f55b214d5093d7acece791c
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_frameworks_av into kitkat