Rework: improve OnGoingCallIcon API.

features/roomlist/impl/src/main/kotlin/io/element/android/features/roomlist/impl/components/RoomSummaryRow.kt

@@ -173,9 +173,9 @@ private fun RowScope.LastMessageAndIndicatorRow(room: RoomListRoomSummary) {
         verticalAlignment = Alignment.CenterVertically,
     ) {
         // Video call
-        OnGoingCallIcon(
-            room.hasRoomCall,
-        )
+        if (room.hasRoomCall) {
+            OnGoingCallIcon()
+        }
         // Other indicators
         NotificationIcons(
             room.userDefinedNotificationMode,
@@ -186,10 +186,7 @@ private fun RowScope.LastMessageAndIndicatorRow(room: RoomListRoomSummary) {
 }
 
 @Composable
-private fun OnGoingCallIcon(
-    hasRoomCall: Boolean,
-) {
-    if (hasRoomCall) {
+private fun OnGoingCallIcon() {
     Icon(
         modifier = Modifier.size(16.dp),
         imageVector = CompoundIcons.VideoCallSolid,
@@ -197,7 +194,6 @@ private fun OnGoingCallIcon(
         tint = ElementTheme.colors.unreadIndicator,
     )
 }
-}
 
 @Composable
 private fun RowScope.NotificationIcons(