Merged in Menardi/cordova-plugin-run-in-background/android_optimization (pull request #2)

Add more Android battery optimisation functions

- Go to Battery Optimization settings screen
- Add function to check if battery optimization is enabled or not

www/background-mode.js

@@ -177,6 +177,38 @@ exports.disableBatteryOptimizations = function()
     }
 };
 
+/**
+ * Opens the system settings screen for battery optimization, allowing the user to
+ * manually change the optimization settings.
+ *
+ * @return [ Void ]
+ */
+exports.openBatteryOptimizationsSettings = function()
+{
+    if (this._isAndroid)
+    {
+        cordova.exec(null, null, 'BackgroundModeExt', 'batterysettings', []);
+    }
+};
+
+/**
+ * Opens the system settings screen for battery optimization, allowing the user to
+ * manually change the optimization settings.
+ *
+ * @return [ Void ]
+ */
+exports.isIgnoringBatteryOptimizations = function(callback)
+{
+    if (this._isAndroid)
+    {
+        cordova.exec(callback, null, 'BackgroundModeExt', 'optimizationstatus', []);
+    }
+    else
+    {
+        callback(true);
+    }
+};
+
 /**
  * Opens the system settings dialog where the user can tweak or turn off any
  * custom app start settings added by the manufacturer if available.