Fix code quality.

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/timeline/TimelineView.kt

@@ -168,7 +168,7 @@ fun TimelineView(
 }
 
 @Composable
-fun TimelineItemRow(
+internal fun TimelineItemRow(
     timelineItem: TimelineItem,
     showReadReceipts: Boolean,
     isLastOutgoingMessage: Boolean,

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/timeline/components/TimelineItemGroupedEventsRow.kt

@@ -156,7 +156,7 @@ private fun TimelineItemGroupedEventsRowContent(
 
 @PreviewsDayNight
 @Composable
-fun TimelineItemGroupedEventsRowContentExpandedPreview() = ElementPreview {
+internal fun TimelineItemGroupedEventsRowContentExpandedPreview() = ElementPreview {
     TimelineItemGroupedEventsRowContent(
         isExpanded = true,
         onExpandGroupClick = {},
@@ -180,7 +180,7 @@ fun TimelineItemGroupedEventsRowContentExpandedPreview() = ElementPreview {
 
 @PreviewsDayNight
 @Composable
-fun TimelineItemGroupedEventsRowContentCollapsePreview() = ElementPreview {
+internal fun TimelineItemGroupedEventsRowContentCollapsePreview() = ElementPreview {
     TimelineItemGroupedEventsRowContent(
         isExpanded = false,
         onExpandGroupClick = {},