Return linux_android_rel_ng to the CQ.

This reverts https://codereview.chromium.org/1310453007

BUG=523349
TBR=sergiyb@chromium.org

Review URL: https://codereview.chromium.org/1312933002

Cr-Commit-Position: refs/heads/master@{#345241}

infra/config/cq.cfg

@@ -40,10 +40,7 @@ verifiers {
       builders { name: "chromeos_amd64-generic_chromium_compile_only_ng" }
       builders { name: "chromeos_daisy_chromium_compile_only_ng" }
       builders { name: "chromium_presubmit" }
-      builders {
-        name: "linux_android_rel_ng"
-        experiment_percentage: 100
-      }
+      builders { name: "linux_android_rel_ng" }
       builders {
         name: "linux_arm_compile"
         experiment_percentage: 100