[DO NOT MERGE] Increased user switch timeout to 3s

    // Amount of time we wait for observers to handle a user switch before

    // giving up on them and unfreezing the screen.

    static final int USER_SWITCH_TIMEOUT = 2 * 1000;

    static final int USER_SWITCH_TIMEOUT = 3 * 1000;

    private final ActivityManagerService mService;

    private final Handler mHandler;

                mCurWaitingUserSwitchCallbacks = curWaitingUserSwitchCallbacks;

            }

            final AtomicInteger waitingCallbacksCount = new AtomicInteger(observerCount);

            final long dispatchStartedTime = SystemClock.elapsedRealtime();

            for (int i = 0; i < observerCount; i++) {

                try {

                    // Prepend with unique prefix to guarantee that keys are unique

                        @Override

                        public void sendResult(Bundle data) throws RemoteException {

                            synchronized (mService) {

                                long delay = SystemClock.elapsedRealtime() - dispatchStartedTime;

                                if (delay > USER_SWITCH_TIMEOUT) {

                                    Slog.wtf(TAG, "User switch timeout: observer "  + name

                                            + " sent result after " + delay + " ms");

                                }

                                // Early return if this session is no longer valid

                                if (curWaitingUserSwitchCallbacks

                                        != mCurWaitingUserSwitchCallbacks) {