ui: Import VisualMarkerStyle in actual_frames_track.ts

ui/src/plugins/dev.perfetto.Frames/actual_frames_track.ts

diff --git a/ui/src/plugins/dev.perfetto.Frames/actual_frames_track.ts b/ui/src/plugins/dev.perfetto.Frames/actual_frames_track.ts
index 4a4e8f3..7f87c5f 100644
--- a/ui/src/plugins/dev.perfetto.Frames/actual_frames_track.ts
+++ b/ui/src/plugins/dev.perfetto.Frames/actual_frames_track.ts
@@ -21,6 +21,7 @@
 import {SourceDataset} from '../../trace_processor/dataset';
 import {SliceTrack} from '../../components/tracks/slice_track';
 import {ThreadSliceDetailsPanel} from '../../components/details/thread_slice_details_tab';
+import type {VisualMarkerStyle} from '../../components/tracks/visual_marker';
 
 // color named and defined based on Material Design color palettes
 // 500 colors indicate a timeline slice is not a partial jank (not a jank or