[Analytics] Add InitiateOnDeviceConversionMeasurementWithEmailAddress (#328)

* Call InitiateOnDeviceConversionMeasurementWithEmailAddress in the analytics testapp. No code change necessary since swig autogenerates this method.

* updated release notes readme

Author: AlmostMatt

analytics/testapp/Assets/Firebase/Sample/Analytics/UIHandler.cs

@@ -59,6 +59,8 @@ public virtual void Update() {
     void InitializeFirebase() {
       DebugLog("Enabling data collection.");
       FirebaseAnalytics.SetAnalyticsCollectionEnabled(true);
+      DebugLog("Initiate on-device conversion measurement.");
+      FirebaseAnalytics.InitiateOnDeviceConversionMeasurementWithEmailAddress("[email protected]");
 
       DebugLog("Set user properties.");
       // Set the user's sign up method.

docs/readme.md

@@ -160,6 +160,8 @@ Release Notes
     - General: Added a missing namespace to the Google.MiniJson.dll.
     - Functions: Add a new method `GetHttpsCallableFromURL`, to create callables
       with URLs other than cloudfunctions.net.
+    - Analytics (iOS): Added InitiateOnDeviceConversionMeasurementWithEmail function to facilitate the
+      [on-device conversion measurement](https://support.google.com/google-ads/answer/12119136) API.
 
 ### 9.0.0
 - Changes