private int getIncrement() {
    return (int) (((float) FRAME_INTERVAL_MS) / mInterval * DEGREES_IN_FULL_ROTATION);
  }
Schedule the next frame for drawing.

<p>Ideally, we'd like to call this from the callback (i.e. {@code run()}), but if we do there's
no place where we can call scheduleNextFrame() for the first time. As a tradeoff, we call this
from draw(), which means scheduleNextFrame() could technically be called multiple times for the
same frame, so we must handle that gracefully.
drawee/src/main/java/com/facebook/drawee/drawable/AutoRotateDrawable.java