[Android] Turn on android_cronet CQ builder at 10%.

infra/config/cq.cfg

Index: infra/config/cq.cfg
diff --git a/infra/config/cq.cfg b/infra/config/cq.cfg
index bf802fd80e8eaf504f49ad36dbfa2ae845b284cc..7c7ff70b6fd5b4bc0e42c8fdd32e4316ecaf0534 100644
--- a/infra/config/cq.cfg
+++ b/infra/config/cq.cfg
@@ -37,6 +37,10 @@ verifiers {
         experiment_percentage: 100
       }
       builders { name: "cast_shell_android" }
+      builders {
+        name: "android_cronet"
+        experiment_percentage: 10
+      }
       builders { name: "linux_android_rel_ng" }
     }
     buckets {