Bug 1500560 - Add Resource ID for `LocationView` URL bar. r=snorp

Differential Revision: https://phabricator.services.mozilla.com/D11036

--HG--
extra : moz-landing-system : lando

mobile/android/geckoview_example/src/main/java/org/mozilla/geckoview_example/GeckoViewActivity.java

@@ -100,6 +100,7 @@ public class GeckoViewActivity extends AppCompatActivity {
         setSupportActionBar((Toolbar)findViewById(R.id.toolbar));
 
         mLocationView = new LocationView(this);
+        mLocationView.setId(R.id.url_bar);
         getSupportActionBar().setCustomView(mLocationView,
                 new ActionBar.LayoutParams(ActionBar.LayoutParams.MATCH_PARENT,
                         ActionBar.LayoutParams.WRAP_CONTENT));

mobile/android/geckoview_example/src/main/res/values/ids.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <item name="url_bar" type="id"/>
+</resources>