fix (#3636)

Author: VinayGuthal

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

@@ -341,7 +341,7 @@ private static void logToFirelog(
           .getTransport(
               FirelogAnalytics.FCM_LOG_SOURCE,
               MessagingClientEventExtension.class,
-              Encoding.of("src/main/proto"),
+              Encoding.of("proto"),
               MessagingClientEventExtension::toByteArray)
           .send(
               Event.ofTelemetry(