Mark Linux_android_emu tests bringup: true (#152867)

Due to flutter/flutter#152684

This PR is just eagerly doing what the flake bot would do on Wednesday.

FYI @matanlurey @reidbaker

Author: zanderso

.ci.yaml

@@ -376,6 +376,7 @@ targets:
 
   - name: Linux_android_emu android views
     recipe: devicelab/devicelab_drone
+    bringup: true # https://github.com/flutter/flutter/issues/152684
     properties:
       tags: >
         ["framework","hostonly","linux"]
@@ -1297,7 +1298,7 @@ targets:
   - name: Linux_android_emu flutter_driver_android_test
     recipe: flutter/flutter_drone
     timeout: 60
-    bringup: false
+    bringup: true # https://github.com/flutter/flutter/issues/152684
     properties:
       shard: flutter_driver_android
       tags: >
@@ -2033,6 +2034,7 @@ targets:
 
   - name: Linux_android_emu android_defines_test
     recipe: devicelab/devicelab_drone
+    bringup: true # https://github.com/flutter/flutter/issues/152684
     timeout: 60
     properties:
       tags: >
@@ -2457,6 +2459,7 @@ targets:
 
   - name: Linux_android_emu external_textures_integration_test
     recipe: devicelab/devicelab_drone
+    bringup: true # https://github.com/flutter/flutter/issues/152684
     timeout: 60
     # Functionally the same as "presubmit: false", except that we will run on
     # presubmit during engine rolls. This test is the *only* automated e2e