Bug 1799964 - Migrate firefox-android from AWS to GCP (#128)

Co-authored-by: Andrew Halberstadt <ahal@mozilla.com>

.taskcluster.yml

@@ -183,7 +183,7 @@ tasks:
                                               name: "Decision Task for cron job ${cron.job_name}"
                                               description: 'Created by a [cron task](https://firefox-ci-tc.services.mozilla.com/tasks/${cron.task_id})'
                             provisionerId: "mobile-${level}"
-                            workerType: "decision"
+                            workerType: "decision-gcp"
                             tags:
                                 $if: 'isPullRequest || tasks_for == "github-push"'
                                 then:

taskcluster/ci/config.yml

@@ -161,7 +161,7 @@ workers:
             provisioner: 'mobile-{level}'
             implementation: docker-worker
             os: linux
-            worker-type: b-linux-large
+            worker-type: b-linux-large-gcp
         beetmover:
             provisioner: scriptworker-k8s
             implementation: scriptworker-beetmover
@@ -181,7 +181,7 @@ workers:
             provisioner: 'mobile-{level}'
             implementation: docker-worker
             os: linux
-            worker-type: images
+            worker-type: images-gcp
         ship-it:
             provisioner: scriptworker-k8s
             implementation: scriptworker-shipit