@Override
                public void run() {
                    android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_BACKGROUND);
                    super.run();
                }
A {@link ThreadFactory} that builds threads with priority
{@link android.os.Process#THREAD_PRIORITY_BACKGROUND}.
core/src/main/java/com/bumptech/glide/load/engine/executor/FifoPriorityThreadPoolExecutor.java