Wait for Settings scroll idle before asserting the retained row

app/src/test/java/org/justinvisser/wolfskin/tv/update/UpdatesKeysTest.kt

@@ -92,6 +92,8 @@ class UpdatesKeysTest {
         launch(UpdateUiState.Checking, settings = true)
         repeat(9) { press(listOf(Key.DirectionDown)) }
         assertEquals(9, shell.settingsRow)
+        // Visual settling precedes the spring's idle state and final row boundary.
+        rule.mainClock.advanceTimeUntil(timeoutMillis = 320) { !shell.view.listState.isScrollInProgress }
         assertEquals(4, shell.view.listState.firstVisibleItemIndex)
         capture("classic")
         press(listOf(Key.DirectionCenter))