[Android] Make Android CQ bot non-experimental.

BUG=pdfium:416

Review-Url: https://codereview.chromium.org/2283313002
diff --git a/infra/config/cq.cfg b/infra/config/cq.cfg
index 351e1a1..6d9b577 100644
--- a/infra/config/cq.cfg
+++ b/infra/config/cq.cfg
@@ -24,7 +24,6 @@
       name: "master.tryserver.client.pdfium"
       builders {
         name: "android"
-        experiment_percentage: 100
       }
       builders {
         name: "linux"