Add LUCI configs to mirror O/P testers

Adds LUCI configs for try-oreo-phone-tester and
try-android-pie-arm64-dbg, which are manual-only trybots that will
mirror "Oreo Phone Tester" and "android-pie-arm64-dbg". These are useful
since these are currently the only two testers that run the AR tests.

Bug: 934486
Change-Id: I323b5f3371c375105bae25ac2cb1a2136fd62b60
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1701519
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#677478}
3 files changed