Set android-binary-size bot to 100% experiment

So far seems to be working fine and not becoming overloaded.

Bug: 702625
Change-Id: I1a83fc0594f1b1ac69ff0b70f9997b59c08db3c8
Reviewed-on: https://chromium-review.googlesource.com/1114318Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: agrieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570280}

infra/config/branch/cq.cfg

@@ -35,7 +35,7 @@ verifiers {
       # https://crbug.com/702625
       builders {
         name: "android-binary-size"
-        experiment_percentage: 10
+        experiment_percentage: 100
       }
       builders { name: "android_clang_dbg_recipe" }
       builders { name: "android_compile_dbg" }