Steps to Reproduce

1. Enable Material 3 in ThemeData
2. Use multiple FilterChip/ChoiceChip widgets (some in selected state)
3. Navigate the app using keyboard to focus tappable widgets

Expected results:

The selected FilterChip/ChoiceChip should adhere to theming according to M3 specs, as tracked in #115364.

Actual results:

When using focus to navigate the app, user cannot identify what selected chip actually has focus. Unfocused selected Chip looks the same as focused selected Chip.

ThemeData(
	useMaterial3: true,
	colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue),
),

ChoiceChip(
	label: Text("First"),
	selected: true,
	onSelected: (value) {},
),
ChoiceChip(
	label: Text("Second"),
	selected: false,
	onSelected: (value) {},
),

Focus on first widget:

Focus on second widget: