public ImageRequestBuilder disableDiskCache() {
    int mask = CachesLocationsMasks.DISK_READ | CachesLocationsMasks.DISK_WRITE;
    mCachesDisabled = mCachesDisabled | mask;
    return this;
  }
Disables disk cache for this request, regardless where the image will come from.
imagepipeline/src/main/java/com/facebook/imagepipeline/request/ImageRequestBuilder.java