Stop the debug apk build when there are no changes

[x9136]

About this discussion

It takes several minutes to build the debug apk, but if Lawnicons doesn't change, then the build action is triggered in vain.

I suggest adding a check to the build action so that it is successfully canceled when there are no updates. This would help in some cases to merge the PR without waiting for the build.

[Goooler]

You need https://github.com/LawnchairLauncher/lawnchair/blob/6602ea131631fa50428d875b5a4eda85e6af1acb/.github/workflows/ci.yml#L17-L25

[x9136]

Reopened because the current implementation prevents merging PRs. #2373

The idea was for the debug apk build to stop and skip, rather than stop the workflow.