Revert of Temporarily move android_rel_tests_recipe to 100% experiment to...

Revert of Temporarily move android_rel_tests_recipe to 100% experiment to unblock CQ (patchset #1 id:1 of https://codereview.chromium.org/973063002/)

Reason for revert:
clang roll got reverted, this should no longer be needed

Original issue's description:
> Temporarily move android_rel_tests_recipe to 100% experiment to unblock CQ
>
> TBR=machenbach
>
> BUG=463436
>
> Committed: https://chromium.googlesource.com/chromium/src/+/064e04615cf8557e63c10aa7917ea23341116fa0

TBR=machenbach@chromium.org,phajdan.jr@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=463436

Review URL: https://codereview.chromium.org/975093002

Cr-Commit-Position: refs/heads/master@{#318947}

testing/commit_queue/config.json

@@ -44,7 +44,6 @@
             "trybots": {
                 "launched": {
                     "tryserver.chromium.linux": {
-                        "android_rel_tests_recipe": ["defaulttests"]
                     },
                     "tryserver.chromium.mac": {
                     }
@@ -67,6 +66,7 @@
               "linux_chromium_gn_dbg": ["defaulttests"],
               "linux_chromium_gn_rel": ["defaulttests"],
               "linux_chromium_rel_ng": ["defaulttests"],
+              "android_rel_tests_recipe": ["defaulttests"],
               "android_arm64_dbg_recipe": ["defaulttests"],
               "android_clang_dbg_recipe": ["defaulttests"],
               "android_aosp": ["compile"],