Fix Android remote debug not hitting breakpoints

A change in `Main`'s API is needed. Please read the comment in the diff for an explanation.

platform/android/java_glue.cpp

@@ -1008,7 +1008,9 @@ JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_step(JNIEnv *env, job
 		ProjectSettings::get_singleton()->add_singleton(ProjectSettings::Singleton("JavaClassWrapper", java_class_wrapper));
 		_initialize_java_modules();
 
-		Main::setup2();
+		// Since Godot is initialized on the UI thread, _main_thread_id was set to that thread's id,
+		// but for Godot purposes, the main thread is the one running the game loop
+		Main::setup2(Thread::get_caller_id());
 		++step;
 		suspend_mutex->unlock();
 		input_mutex->unlock();