Increase goma jobs for android-pie-arm64-rel.

Bug: 1021665
Change-Id: I6de2e17733078cb0f433ecc20b42f11c0e2cb521
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1902768Reviewed-by: Aaron Gable <agable@chromium.org>
Commit-Queue: Andrew Luo <aluo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714359}

infra/config/buckets/try.star

@@ -258,6 +258,8 @@ android_builder(
 
 android_builder(
     name = 'android-pie-arm64-rel',
+    goma_backend = goma.backend.RBE_PROD,
+    goma_jobs = goma.jobs.J300,
     tryjob = tryjob(
         experiment_percentage = 50,
     ),

infra/config/generated/cr-buildbucket.cfg

@@ -10347,6 +10347,7 @@ buckets: <
         name: "chromium_trybot"
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
         cipd_version: "refs/heads/master"
+        properties_j: "$build/goma:{\"jobs\":300,\"rpc_extra_params\":\"?prod\",\"server_host\":\"goma.chromium.org\"}"
         properties_j: "$kitchen:{\"devshell\":true,\"git_auth\":true}"
         properties_j: "mastername:\"tryserver.chromium.android\""
       >