weblayer, skew tests: Add back GOMA compilation to mb_config.pyl

Bug: 1041619
Change-Id: Ifab7a7de001c3193f031b1fa437b851cf7cc1c6b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2415276Reviewed-by: Erik Staab <estaab@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Rakib Hasan <rmhasan@google.com>
Cr-Commit-Position: refs/heads/master@{#807936}

weblayer/browser/android/javatests/skew/mb_config.pyl

@@ -65,10 +65,9 @@
     'release': {
       'gn_args': 'is_debug=false',
     },
-    # TODO(rmhasan): Add back GOMA support when you can start the goma proxy
-    # in a recipe.
+
     'release_bot': {
-      'mixins': ['release', 'static'],
+      'mixins': ['release', 'static', 'goma'],
     },
 
     'static': {