Handle apps that upgrade to full conversations

- Apps that have sent incomplete conversations only are allowed
into the conversation section, but not allowed to have full controls.
Users can also demote these apps entirely from the converstion space
- Once an app starts using complete notifications, it can no longer
be fully demoted out of the conversation space, it's only demoted on
a per conversation basis.
- If an app has sent full conversation notifications, and then sends
an incomplete one, the incomplete notification will not be shown in
the conversation space.

Test: atest
Bug: 155276427

Change-Id: Iba9b01c53949632b6db2834511165e3571387ac9