Fix unit tests

lib/android/app/src/test/java/com/reactnativenavigation/viewcontrollers/modal/ModalStackTest.java

 
     @Test
     public void dismissAllModal_resolvesPromiseSuccessfullyWhenCalledBeforeRootIsSet() {
-        CommandListenerAdapter spy = new CommandListenerAdapter();
+        CommandListenerAdapter spy = spy(new CommandListenerAdapter());
         uut.dismissAllModals(null, Options.EMPTY, spy);
         verify(spy).onSuccess("");
     }