Issue #267: Setup release task to fetch sentry token and enable crash reporting.

.taskcluster.yml

@@ -43,6 +43,7 @@ tasks:
             - queue:scheduler-id:${scheduler_id}
             - queue:create-task:highest:aws-provisioner-v1/${build_worker_type}
             - project:mobile:fenix:releng:signing:format:autograph_apk
+            - secrets:get:project/mobile/fenix/sentry
             - $if: is_mozilla_mobile_repo
               then:
                 - queue:create-task:highest:scriptworker-prov-v1/mobile-signing-v1

automation/taskcluster/decision_task_nightly.py

@@ -40,12 +40,18 @@ def generate_build_task(apks, is_staging):
     return taskcluster.slugId(), BUILDER.build_task(
         name="(Fenix) Build task",
         description="Build Fenix from source code.",
-        command='cd .. && {} && ./gradlew --no-daemon clean test assembleRelease'.format(checkout),
+        command=('cd .. && ' + checkout +
+            ' && python automation/taskcluster/helper/get-secret.py'
+            ' -s project/mobile/fenix/sentry -k dsn -f .sentry_token'
+            ' && ./gradlew --no-daemon -PcrashReports=true clean test assembleRelease'),
         features={
             "chainOfTrust": True
         },
         artifacts=artifacts,
         worker_type='android-components-g' if is_staging else 'gecko-focus',
+        scopes=[
+            "secrets:get:project/mobile/fenix/sentry"
+        ]
     )