mark android impeller tests as bringup (#130525)

These should not close the tree as this backend is a WIP.

.ci.yaml

@@ -2307,8 +2307,10 @@ targets:
   - name: Linux_android new_gallery_impeller__transition_perf
     recipe: devicelab/devicelab_drone
     presubmit: false
+    bringup: true
     timeout: 60
     properties:
+      ignore_flakiness: "true"
       tags: >
         ["devicelab", "android", "linux"]
       task_name: new_gallery_impeller__transition_perf
@@ -2593,8 +2595,10 @@ targets:
   - name: Linux_android animated_blur_backdrop_filter_perf__timeline_summary
     recipe: devicelab/devicelab_drone
     presubmit: false
+    bringup: true
     timeout: 60
     properties:
+      ignore_flakiness: "true"
       tags: >
         ["devicelab", "android", "linux"]
       task_name: animated_blur_backdrop_filter_perf__timeline_summary