Run the flutter/plugins tests on presubmit, make it part of the tree status (#71502)

diff --git a/dev/prod_builders.json b/dev/prod_builders.json
index 0590b9a..dbe7617 100644
--- a/dev/prod_builders.json
+++ b/dev/prod_builders.json
@@ -163,6 +163,12 @@
         "flaky":false
       },
       {
+         "name":"Linux flutter_plugins",
+         "repo":"flutter",
+         "task_name":"flutter_plugins",
+         "flaky":false
+      },
+      {
          "name": "Mac build_aar_module_test",
          "repo": "flutter",
          "task_name": "mac_build_aar_module_test",
diff --git a/dev/try_builders.json b/dev/try_builders.json
index ebb175d..4d989eb 100644
--- a/dev/try_builders.json
+++ b/dev/try_builders.json
@@ -182,6 +182,12 @@
          "run_if":["examples/hello_world/**" ,"dev/**", "packages/flutter/**", "packages/flutter_driver/**", "packages/flutter_test/**", "packages/flutter_tools/lib/src/test/**", "packages/flutter_web_plugins/**", "bin/**"]
       },
       {
+         "name":"Linux flutter_plugins",
+         "repo":"flutter",
+         "task_name":"flutter_plugins",
+         "enabled":true
+      },
+      {
          "name":"Mac build_aar_module_test",
          "repo":"flutter",
          "task_name":"mac_build_aar_module_test",