Marks Mac_android tiles_scroll_perf__timeline_summary to be unflaky (flutter#89174)

Author: fluttergithubbot

.ci.yaml

@@ -2767,7 +2767,6 @@ targets:
     recipe: devicelab/devicelab_drone
     presubmit: false
     timeout: 60
-    bringup: true
     properties:
       tags: >
         ["devicelab","android","mac"]