Run chrome_public_test_apk at 100% on android-marshmallow-x86-rel

This CL follows crrev.com/c/2683027 and increases the percentage to 100.

The test suite consumed about 35% of the e2-standard-8 when it ran at
50% (http://shortn/_VkMhSyjNJ5, 1h window). So the test pool should be
sufficient for running at 100%.

The builder pool also looks good: http://shortn/_mj2eAYqiKJ

Bug: 1127110
Change-Id: I6d7319a2e28519fdf7558494484c6582f5104d13
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2694014
Reviewed-by: Ben Pastene <[email protected]>
Commit-Queue: Haiyang Pan <[email protected]>
Cr-Commit-Position: refs/heads/master@{#853772}
diff --git a/testing/buildbot/test_suite_exceptions.pyl b/testing/buildbot/test_suite_exceptions.pyl
index 96c041d..71971d18 100644
--- a/testing/buildbot/test_suite_exceptions.pyl
+++ b/testing/buildbot/test_suite_exceptions.pyl
@@ -791,7 +791,7 @@
           ],
         },
         # TODD(crbug.com/1127110): Remove experimental once it works fine.
-        'experiment_percentage': 50,
+        'experiment_percentage': 100,
       },
       'android-marshmallow-x86-rel-non-cq': {
         'args': [