Allow app from being excluded from recent list

www/background-mode.js

@@ -158,6 +158,17 @@ exports.moveToForeground = function () {
     }
 };
 
+/**
+ * Exclude the app from the recent tasks list (Android only).
+ *
+ * @return [ Void ]
+ */
+exports.excludeFromTaskList = function () {
+    if (this._isAndroid) {
+        cordova.exec(null, null, 'BackgroundMode', 'tasklist', []);
+    }
+};
+
 /**
  * Override the back button on Android to go to background
  * instead of closing the app.