Implement optional foreground service

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

@@ -22,7 +22,9 @@
         <item>GPS provider</item>
         <item>Network provider</item>
     </string-array>
-    
+    <string name="settings_foreground_title">Foreground service</string>
+    <string name="settings_foreground_summary">Increase service priority</string>
+
     <string name="menu_status">Status</string>
     <string name="menu_about">About</string>
     <string name="menu_clear">Clear</string>