[bbagent] include build id in the default read mask
[bbagent] include build id in the default read mask

So that build like https://ci.chromium.org/ui/p/chromium/builders/try/linux-rel/988884/overview can be correctly set to canceled instead of infra_failure.

Bug: 1031205
Change-Id: I1dfdcf01eb58294354004bc1d79f29b1ca8a57ec
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/3594449
Auto-Submit: Chan Li <332b6c56634d0f63001046c664a2370006a02420@chromium.org>
Reviewed-by: Robbie Iannucci <40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org>
Commit-Queue: Robbie Iannucci <40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org>

luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go