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/api/src/main/kotlin/io/element/android/libraries/matrix/api/room/MatrixRoom.kt

@@ -86,6 +86,11 @@ interface MatrixRoom : Closeable {
      */
     suspend fun updateMembers()
 
+    /**
+     * Will return an updated member or an error.
+     */
+    suspend fun getUpdatedMember(userId: UserId): Result<RoomMember>
+
     suspend fun updateRoomNotificationSettings(): Result<Unit>
 
     val syncUpdateFlow: StateFlow<Long>