We now generate a versionCode directly from the release version number,
and this is what we use for Google Play Store to ensure that we have
an always-incrementing version number.
When displaying the Info page of alpha builds from the Play Store, we noticed the version string displayed the wrong environment:
`14.0.X-alpha-local` (CI builds should have ended with `-alpha`).
It turns out the `VERSION_` shell variables from `build-utils.sh` aren't visible in `version.gradle` (though CI environment variables like `build_counter` are visible).
This PR:
* Exports the two VERSION strings needed in version.gradle
* Updates the Info page to simply display `BuildConfig.VERSION_NAME`