CQ: Remove android_arm64_rel trybot

Reason for revert:
It's now offline permanently again :/

Original issue's description:
> Revert of CQ: Remove android_arm64_rel trybot (patchset #1 id:1 of https://codereview.webrtc.org/2270943003/ )
>
> Reason for revert:
> The machine seems healthy again.
>
> Original issue's description:
> > CQ: Remove android_arm64_rel trybot
> >
> > The bot is having problems again.
> >
> > NOTRY=true
> > BUG=634266
> > TBR=ehmaldonado@webrtc.org
> >
> > Committed: https://crrev.com/24ee05016ccb1c1ea05c4b646fb29e2cefbfe439
> > Cr-Commit-Position: refs/heads/master@{#13874}
>
> TBR=ehmaldonado@webrtc.org
> NOTRY=true
> BUG=634266
>
> Committed: https://crrev.com/01e0ee62e437295c0e175a7448f2a3807f962b47
> Cr-Commit-Position: refs/heads/master@{#13923}

TBR=ehmaldonado@webrtc.org
BUG=634266
NOTRY=True

Review-Url: https://codereview.webrtc.org/2292233003
Cr-Commit-Position: refs/heads/master@{#13992}
diff --git a/infra/config/cq.cfg b/infra/config/cq.cfg
index 1dd8e43..3afe1e6 100644
--- a/infra/config/cq.cfg
+++ b/infra/config/cq.cfg
@@ -28,7 +28,7 @@
       name: "master.tryserver.webrtc"
       builders { name: "android_dbg" }
       builders { name: "android_rel" }
-      builders { name: "android_arm64_rel" }
+      # builders { name: "android_arm64_rel" }
       builders { name: "android_clang_dbg" }
       builders { name: "android_compile_mips_dbg" }
       builders { name: "android_compile_x86_dbg" }