Display banned users in room member list (#2415)

* Display banned users in room member list

---------

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

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

@@ -129,6 +129,8 @@ interface MatrixRoom : Closeable {
 
     suspend fun canUserInvite(userId: UserId): Result<Boolean>
 
+    suspend fun canUserBan(userId: UserId): Result<Boolean>
+
     suspend fun canUserRedactOwn(userId: UserId): Result<Boolean>
 
     suspend fun canUserRedactOther(userId: UserId): Result<Boolean>

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

@@ -25,6 +25,11 @@ import io.element.android.libraries.matrix.api.room.StateEventType
  */
 suspend fun MatrixRoom.canInvite(): Result<Boolean> = canUserInvite(sessionId)
 
+/**
+ * Shortcut for calling [MatrixRoom.canBanUser] with our own user.
+ */
+suspend fun MatrixRoom.canBan(): Result<Boolean> = canUserBan(sessionId)
+
 /**
  * Shortcut for calling [MatrixRoom.canUserSendState] with our own user.
  */