@Override
  public int getFrameForTimestampMs(int timestampMs) {
    return mAnimatedDrawableUtil.getFrameForTimestampMs(mFrameTimestampsMs, timestampMs);
  }
An {@link AnimatedDrawableBackend} that renders {@link AnimatedImage}.
animated-base/src/main/java/com/facebook/imagepipeline/animated/impl/AnimatedDrawableBackendImpl.java