Issue Summary

When getting a notification about a card there is no indication in the notification payload what the role of the card is. This can lead to a situation where a notification regarding a separator, board, link, or otherwise non-normal card (whos card back should not be openable) is received and tapping the notification opens the card back.

https://bitbucket.org/trello/android/pull-requests/12279#comment-543375232

Steps to Reproduce

1. Watch a list on account a and navigate away from the board
2. Add a separator card to this list from account b
3. Get notified on account a about the card
4. Tap the notification
5. Separator card back opened (adding meta to which converts it to a normal card)

Expected Results

Non-normal cards cannot have their card back opened