Add flutter remote in CI

3 jobs for v0.13.0 in 12 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
failed #1261
docker
build

00:00:12

 
  Release
skipped #1262
docker
release
skipped #1263
docker
sentry
 
Name Stage Failure
failed
build Build

Skipping Git submodules setup
$ cd /home/cirrus/sdks/flutter
$ git remote add origin https://github.com/flutter/flutter
fatal: remote origin already exists.
Running after script...
$ rm android/app/pattle.keystore
rm: cannot remove 'android/app/pattle.keystore': No such file or directory
ERROR: Job failed: exit code 1