Display room invitation notification (#735)

* Notifications: Add some extra mappings so we keep the original contents and can pass it later to an UI layer

* Fix notifications not appearing for a room if the app was on that room when it went to background.

* Modernize how we create spannable strings for notifications, remove unneeded dependency

* Remove actions from invite notifications temporarily

* Add `NotificationDrawerManager` interface to be able to clear membership notifications when accepting or rejecting a room invite

* Fix tests

* Add comment to clarify some weird behaviours

* Address review comments

* Set circle shape for `largeBitmap` in message notifications

* Fix no avatar in DM rooms

* Fix rebase issues

* Add invite list pending intent:

- Refactor pending intents.
- Make `DeepLinkData` a sealed interface.
- Fix and add tests.

* Rename `navigate__` functions to `attach__`

* Add an extra test case for the `InviteList` deep link

* Address most review comments.

* Fix rebase issue

* Add fallback notification type, allow dismissing invite notifications.

Fallback notifications have a different underlying type and can be dismissed at will.

* Fix tests

gradle/libs.versions.toml

@@ -152,7 +152,6 @@ sqldelight-coroutines = { module = "com.squareup.sqldelight:coroutines-extension
 sqlcipher = "net.zetetic:android-database-sqlcipher:4.5.4"
 sqlite = "androidx.sqlite:sqlite:2.3.1"
 unifiedpush = "com.github.UnifiedPush:android-connector:2.1.1"
-gujun_span = "me.gujun.android:span:1.7"
 otaliastudios_transcoder = "com.otaliastudios:transcoder:0.10.5"
 vanniktech_blurhash = "com.vanniktech:blurhash:0.1.0"
 vanniktech_emoji = "com.vanniktech:emoji-google:0.16.0"