Bug 1359422 - Add GeckoView constructor that allows both xml attribs and settings r=esawin

MozReview-Commit-ID: 8U1ojpLSSiK

mobile/android/geckoview/src/main/java/org/mozilla/gecko/GeckoView.java

@@ -256,6 +256,13 @@ public class GeckoView extends LayerView
     public GeckoView(Context context, final GeckoViewSettings settings) {
         super(context);
 
+        final GeckoViewSettings newSettings = new GeckoViewSettings(settings, getEventDispatcher());
+        init(context, settings);
+    }
+
+    public GeckoView(Context context, AttributeSet attrs, final GeckoViewSettings settings) {
+        super(context, attrs);
+
         final GeckoViewSettings newSettings = new GeckoViewSettings(settings, getEventDispatcher());
         init(context, newSettings);
     }