CQ: Remove android_arm64_rel trybot
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: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#13992}

TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc