Let teachers view attempts in H5P activity

This issue only needs to be tested in 1 device. In the app, login as teacher in our master site. Go to the H5P reports and open any H5P activity. Open the top right menu and click "View all attempts". Check that you see a list of users. Compare it with the same view in web version and check that the data displayed is the same. Please notice the date format is different, but it should be the same date. Also, we display "-" or "0" instead of empty columns like in web. Click any user. Check that you see more details about the user attempts. Go back to the course and enable download. Download an H5P activity that you haven't seen yet. Go offline, open the H5P activity and go to "View all attempts". Check that the list of users is rendered fine. Click any user. Check that you see more details about the user attempts. Please notice that if you click any attempt now it will fail, we don't prefetch all attempts details because it can be a lot of requests.