Merge "Update background crop animation threshold" into oc-dr1-dev am: 79e11e44

        // for background width/height then screen size at the end of the animation. Will round when

        // the value is smaller then some empiric epsilon. However, this should be fixed by

        // computing correct frames for letterboxed windows in WindowState.

        d = d < 0.02f ? 0 : d;

        d = d < 0.025f ? 0 : d;

        mWindowSurfaceController.getContainerRect(mTmpContainerRect);

        final int backgroundWidth =

                (int) (crop.width() + (mTmpContainerRect.width() - mLastWidth) * (1 - d) + 0.5);