Bug 1409279 - Add telemetry for custom tab. r=walkingice

MozReview-Commit-ID: 6fNhkqo2h9j

--HG--
extra : rebase_source : 34768c40668ad4c728228d6c143936f43c9d8bd9

mobile/android/base/java/org/mozilla/gecko/customtabs/CustomTabsActivity.java

@@ -151,6 +151,9 @@ public class CustomTabsActivity extends AppCompatActivity
             Log.w(LOGTAG, "No intend found for custom tab");
             finish();
         }
+
+        sendTelemetry();
+        recordCustomTabUsage(getReferrerHost());
     }
 
     @Override