Merge "Add thread to check for lock contention."

        // potentially hold longer running operations with no guarantees about the timeliness

        // of operations there.

        //

        // The shared foreground thread is the main checker.  It is where we

        // will also dispatch monitor checks and do other work.

        mMonitorChecker = new HandlerChecker(FgThread.getHandler(),

                "foreground thread");

        // Use a custom thread to check monitors to avoid lock contention from impacted other

        // threads.

        ServiceThread t = new ServiceThread("watchdog.monitor",

                android.os.Process.THREAD_PRIORITY_DEFAULT, true /*allowIo*/);

        t.start();

        mMonitorChecker = new HandlerChecker(new Handler(t.getLooper()), "monitor thread");

        mHandlerCheckers.add(withDefaultTimeout(mMonitorChecker));

        mHandlerCheckers.add(withDefaultTimeout(

                new HandlerChecker(FgThread.getHandler(), "foreground thread")));

        // Add checker for main thread.  We only do a quick check since there

        // can be UI running on the thread.

        mHandlerCheckers.add(withDefaultTimeout(