AOD bottom center setting fix

Author: Navid200

app/src/main/res/xml/xdrip_plus_prefs.xml

@@ -558,7 +558,7 @@
                     android:title="@string/title_aod_use_center" />
                 <CheckBoxPreference
                     android:defaultValue="true"
-                    android:key="aod_use_top_center_bottom"
+                    android:key="aod_use_center_bottom"
                     android:summary="@string/summary_aod_use_center_bottom"
                     android:title="@string/title_aod_use_center_bottom" />
                 <CheckBoxPreference