Skip building Yospace connector on JitPack

[MattiasBuelens]

JitPack doesn't have the necessary credentials for the Yospace Maven repository, so it fails to build the project. From the build log:

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:checkDebugAarMetadata'.
> Could not resolve all files for configuration ':app:debugRuntimeClasspath'.
   > Could not resolve com.yospace:admanagement-sdk:3.6.7.
     Required by:
         project :app
      > Could not resolve com.yospace:admanagement-sdk:3.6.7.
         > Could not get resource 'https://yospacerepo.jfrog.io/yospacerepo/android-sdk/com/yospace/admanagement-sdk/3.6.7/admanagement-sdk-3.6.7.pom'.
            > Username must not be null!

Fix it by skipping the Yospace connector altogether on JitPack, so the other connectors can still be built and published. We will only publish the Yospace connector to maven.theoplayer.com.