Do you know what happens if they don't reinstate? All Google and Facebook employees will be forced to use Android. No one will quit their job bc their work phone isn't an iPhone.
Google will need a new Enterprise Developer certificate from Apple before internal employees can test new versions of existing iOS Apps. If employees can't test, then either the updates won't make it to consumers or the updated versions could have errors.
Google may use a development kit that builds both Android and iOS App binaries from a single source, but they still need to test updates to the iOS App as well as to the Android version.