Android: add reset touch overlay

Source/Android/app/src/main/res/values/strings.xml

@@ -275,6 +275,7 @@
     <string name="emulation_choose_controller">Choose Controller</string>
     <string name="emulation_controller_changed">You may have to reload the game after changing extensions.</string>
     <string name="emulation_touch_button_help">To change the button layout, open the menu -> Configure Controls -> Edit Layout</string>
+    <string name="emulation_touch_overlay_reset">Reset Overlay</string>
 
     <!-- GC Adapter Menu-->
     <string name="gc_adapter_rumble">Enable Vibration</string>