Merge "Set return value for mock(IWindow).asBinder() to prevent exception"

import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_STARTING;

import static android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR;

import static org.mockito.Mockito.doReturn;

import static org.mockito.Mockito.mock;

import android.annotation.Nullable;

        final WindowManagerService wm = mWmSupplier.get();

        synchronized (wm.mWindowMap) {

            atoken = wm.mRoot.getAppWindowToken(appToken);

            IWindow iWindow = mock(IWindow.class);

            doReturn(mock(IBinder.class)).when(iWindow).asBinder();

            window = WindowTestsBase.createWindow(null, TYPE_APPLICATION_STARTING, atoken,

                    "Starting window", 0 /* ownerId */, false /* internalWindows */, wm,

                    mock(Session.class), mock(IWindow.class));

                    mock(Session.class), iWindow);

            atoken.startingWindow = window;

        }

        if (mRunnableWhenAddingSplashScreen != null) {