Android flavors_test is failing, `"app-paid-release.apk" does not exist`

Started on https://github.com/flutter/flutter/pull/114048
```
[flavors_test] [STDOUT] stderr: "build\app\outputs\flutter-apk\app-paid-release.apk" does not exist
```
https://ci.chromium.org/p/flutter/builders/staging/Windows_android%20flavors_test_win/1677
https://ci.chromium.org/p/flutter/builders/staging/Linux_android%20flavors_test/1

cc @a-wallen 