Merge "mService.unlinkToDeath might be called without having linkToDeath"

            mMainHandler.post(() -> {

                try {

                    final IAccessibilityServiceClient serviceInterface;

                    final IBinder service;

                    synchronized (mLock) {

                        serviceInterface = mServiceInterface;

                        mService = (serviceInterface == null) ? null : mServiceInterface.asBinder();

                        service = mService;

                        if (serviceInterface == null) {

                            mService = null;

                        } else {

                            mService = mServiceInterface.asBinder();

                            mService.linkToDeath(this, 0);

                        }

                    }

                    // If the serviceInterface is null, the UiAutomation has been shut down on

                    // another thread.

                    if (serviceInterface != null) {

                        service.linkToDeath(this, 0);

                        serviceInterface.init(this, mId,

                                mOverlayWindowTokens.get(Display.DEFAULT_DISPLAY));

                    }