Fix keyguard wake-up issue.

        private void acquireLocked() {

            if (!mRefCounted || mCount++ == 0) {

                // Do this even if the wake lock is already thought to be held (mHeld == true)

                // because non-reference counted wake locks are not always properly released.

                // For example, the keyguard's wake lock might be forcibly released by the

                // power manager without the keyguard knowing.  A subsequent call to acquire

                // should immediately acquire the wake lock once again despite never having

                // been explicitly released by the keyguard.

                mHandler.removeCallbacks(mReleaser);

                if (!mHeld) {

                try {

                    mService.acquireWakeLock(mFlags, mToken, mTag, mWorkSource);

                } catch (RemoteException e) {

                mHeld = true;

            }

        }

        }

        /**

         * Releases the wake lock.