mojom: Remove braces from module statements and make them come first.

mojo/services/test_service/test_service.mojom

Index: mojo/services/test_service/test_service.mojom
diff --git a/mojo/services/test_service/test_service.mojom b/mojo/services/test_service/test_service.mojom
index bda3b6881ee80fa83701aa92d806dcc3247f2f92..5144addc6139b6d8141d02a1a56dc8b9b157faf3 100644
--- a/mojo/services/test_service/test_service.mojom
+++ b/mojo/services/test_service/test_service.mojom
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module mojo.test {
+module mojo.test;
 
 interface TestService {
   Ping() => ();
@@ -17,5 +17,3 @@ interface TestTimeService {
   GetPartyTime() => (int64 time_usec);
   StartTrackingRequests() => ();
 };
-
-}  // module mojo.test