[Build] Split the Build action into several actions

[tomoya0x00]

In the conference-app-2022, the Build action time is reached 53m eventually.

DroidKaigi/conference-app-2022#647

It would be appreciated if to avoid such a long action time. doesn't it?

We can improve total action time by splitting the Build action into several actions.

like this:

• assemble & upload aab to somewhere
• spotlessCheck
• lint
• local unit tests & report the result

First of all, I think it is good to split assemble & upload aab to somewhere and another.
Ideally, however, lint and local unit tests should run even if spotlessCheck fails. This is because it is ideal to detect all errors at once and show them to the contributors.

[jmatsu]

Which task was heaviest?

[tomoya0x00]

It was . /gradlew assemble -stacktrace, then . /gradlew lintDebug -stacktrace and . /gradlew spotlessCheck -stacktrace.

The log of a successful Build Action could not be viewed because the retention period had expired.

However, the following Build Action cancels the local unit tests in the middle, but it may be helpful

https://github.com/DroidKaigi/conference-app-2022/actions/runs/4036987728/jobs/6939968810

[jmatsu]

Done. Build workflow must be improved.