[ci.yaml] Mark Linux Android Scenarios as flaky (#27422)

diff --git a/.ci.yaml b/.ci.yaml
index ba5543b..85fbc0b 100644
--- a/.ci.yaml
+++ b/.ci.yaml
@@ -63,6 +63,7 @@
 
   - name: Linux Android Scenarios
     builder: Linux Android Scenarios
+    bringup: true # Recipe issue https://github.com/flutter/flutter/issues/86427
     recipe: engine/scenarios
     properties:
       upload_packages: "true"