Android: Add new input mapping implementation

Source/Android/jni/Input/ControlGroup.h

@@ -0,0 +1,13 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <jni.h>
+
+namespace ControllerEmu
+{
+class ControlGroup;
+}
+
+jobject ControlGroupToJava(JNIEnv* env, ControllerEmu::ControlGroup* group);