Add legacy call invite state events and notifications (#2552)

* Add state timeline events and notifications for legacy call invites

* Update screenshots

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Co-authored-by: ElementBot <benoitm+elementbot@element.io>

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/notification/NotificationData.kt

@@ -49,7 +49,9 @@ data class NotificationData(
 sealed interface NotificationContent {
     sealed interface MessageLike : NotificationContent {
         data object CallAnswer : MessageLike
-        data object CallInvite : MessageLike
+        data class CallInvite(
+            val senderId: UserId,
+        ) : MessageLike
         data object CallHangup : MessageLike
         data object CallCandidates : MessageLike
         data object KeyVerificationReady : MessageLike

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/timeline/item/event/EventContent.kt

@@ -98,4 +98,6 @@ data class FailedToParseStateContent(
     val error: String
 ) : EventContent
 
+data object LegacyCallInviteContent : EventContent
+
 data object UnknownContent : EventContent