Upgrade Firelog priority from telemetry to data (#3714)

Author: welishr

firebase-messaging/src/main/java/com/google/firebase/messaging/MessagingAnalytics.java

@@ -344,7 +344,7 @@ private static void logToFirelog(
               Encoding.of("proto"),
               MessagingClientEventExtension::toByteArray)
           .send(
-              Event.ofTelemetry(
+              Event.ofData(
                   MessagingClientEventExtension.newBuilder()
                       .setMessagingClientEvent(clientEvent)
                       .build()));