Remove unnecessary Room.updateMembers() calls. (#2564)

* Remove unnecessary `updateMembers` calls.

Some of them can be directly removed since we have a way to automatically get member info updates based on membership changes.

Others can be replaced by a simpler `getUpdatedMember` method. This might still need a full member sync, but it's quite unlikely.

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/room/RustMatrixRoom.kt

@@ -230,6 +230,12 @@ class RustMatrixRoom(
         roomMemberListFetcher.fetchRoomMembers(source = source)
     }
 
+    override suspend fun getUpdatedMember(userId: UserId): Result<RoomMember> = withContext(roomDispatcher) {
+        runCatching {
+            RoomMemberMapper.map(innerRoom.member(userId.value))
+        }
+    }
+
     override suspend fun userDisplayName(userId: UserId): Result<String?> = withContext(roomDispatcher) {
         runCatching {
             innerRoom.memberDisplayName(userId.value)