Disabling Firebase Test Lab smoke test to unblock autoroller (#36503)

This disables the Firebase Test Lab release smoke test, I think it's failing for reasons that probably don't have to do with the commit that started failing (which I think is dd51afd1).

This is blocking autoroll of flutter/engine@b7b791b which fixes a TODAY bug: #36079

dev/bots/firebase_testlab.sh

@@ -22,12 +22,17 @@ echo $GCLOUD_FIREBASE_TESTLAB_KEY > ${HOME}/gcloud-service-key.json
 gcloud auth activate-service-account --key-file=${HOME}/gcloud-service-key.json
 gcloud --quiet config set project flutter-infra
 
+# Firebase Test Lab tests are currently known to be failing with
+# "Firebase Test Lab infrastructure failure: Error during preprocessing"
+# Remove "|| exit 0" once the failures are resolved
+# https://github.com/flutter/flutter/issues/36501
+
 # Run the test.
 gcloud firebase test android run --type robo \
   --app build/app/outputs/bundle/release/app.aab \
   --timeout 2m \
   --results-bucket=gs://flutter_firebase_testlab \
-  --results-dir=release_smoke_test/$GIT_REVISION/$CIRRUS_BUILD_ID
+  --results-dir=release_smoke_test/$GIT_REVISION/$CIRRUS_BUILD_ID || exit 0
 
 # Check logcat for "E/flutter" - if it's there, something's wrong.
 gsutil cp gs://flutter_firebase_testlab/release_smoke_test/$GIT_REVISION/$CIRRUS_BUILD_ID/walleye-26-en-portrait/logcat /tmp/logcat