am f0556bb9: am 86d1d747: Merge "Add lock before calling initEglImage"

    ssize_t index = mActiveBuffer;

    if (index >= 0) {

        if (!mFailover) {

            {

               // Without that lock, there is a chance of race condition

               // where while composing a specific index, requestBuf

               // with the same index can be executed and touch the same data

               // that is being used in initEglImage.

               // (e.g. dirty flag in texture)

               Mutex::Autolock _l(mLock);

               Image& texture(mBufferData[index].texture);

               err = mTextureManager.initEglImage(&texture, dpy, buffer);

            }

            // if EGLImage fails, we switch to regular texture mode, and we

            // free all resources associated with using EGLImages.

            if (err == NO_ERROR) {