infra: Migrate lollipop CQ bot to 16 core & builderfull.

crrev.com/i/3438440 allocates the machines for this.

Bug: 1140727
Change-Id: I0a4fee5f1d267ec698f20b740cbbc4e0619685c3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2564391Reviewed-by: Haiyang Pan <hypan@google.com>
Reviewed-by: Garrett Beaty <gbeaty@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832025}

infra/config/generated/cr-buildbucket.cfg

@@ -24650,12 +24650,11 @@ buckets {
       name: "android-lollipop-arm-rel"
       swarming_host: "chromium-swarm.appspot.com"
       swarming_tags: "vpython:native-python-wrapper"
-      dimensions: "builderless:1"
-      dimensions: "cores:8"
+      dimensions: "builder:android-lollipop-arm-rel"
+      dimensions: "cores:16"
       dimensions: "cpu:x86-64"
       dimensions: "os:Ubuntu-16.04"
       dimensions: "pool:luci.chromium.try"
-      dimensions: "ssd:0"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
         cipd_version: "refs/heads/master"

infra/config/subprojects/chromium/try.star

@@ -336,6 +336,8 @@ try_.chromium_android_builder(
 try_.chromium_android_builder(
     name = "android-lollipop-arm-rel",
     branch_selector = branches.STANDARD_MILESTONE,
+    builderless = not settings.is_master,
+    cores = 16,
     goma_jobs = goma.jobs.J150,
     main_list_view = "try",
     tryjob = try_.job(),