Add Android support to hasBackgroundMusic

src/common/android.cpp

@@ -225,6 +225,22 @@ bool createStorageDirectories()
 	return true;
 }
 
+bool hasBackgroundMusic()
+{
+	JNIEnv *env = (JNIEnv*) SDL_AndroidGetJNIEnv();
+	jobject activity = (jobject) SDL_AndroidGetActivity();
+
+	jclass clazz(env->GetObjectClass(activity));
+	jmethodID method_id = env->GetMethodID(clazz, "hasBackgroundMusic", "()Z");
+
+	jboolean result = env->CallBooleanMethod(activity, method_id);
+
+	env->DeleteLocalRef(activity);
+	env->DeleteLocalRef(clazz);
+
+	return result;
+}
+
 } // android
 } // love