Loading cursors can happen with cloud-based documents providers
such as Nextcloud.
When they return a cursor that is still loading,
we might continue with stale information.
So now we wait for a loading cursor to be fully loaded
before continuing.
* With the upcoming changes, and the increasing number of external
libraries being used, plus the usage of Kotlin, it's getting harder
and harder to build this with the AOSP build system.
* It's best to leverage the existing gradle build system instead,
and use the apk that builds.
* Add a script which downloads the apk matching the tag if a tag is
checked out, otherwise downloads the latest.
