* Avoids crashes when trying to treat non apk files, such as
privileged extension ota update.zip as apks
* Doesn't do anything at all for now.
One issue with this is the app is always in the not installed state,
so what would be appropriate here would be to change the text of the
install button to download, and update that accrodingly.
However that is outside of the scope of this change.
TODO:
Add toast indicating the user that they need to install
manually, in case of OTA update.zip
bbd77c5b79