[AnimatedAction] Add the icon to the Animated Reply button in SystemUI

and fixed the icon size for animated action.

Note
- Use material color onSurface for the animated reply button icon.
- Manually verified the button UI with icon.
- In the followup cl, add screenshot test for the Animated Reply with icon.

Bug: 383567383
Test: atest SmartActionScreenshotTest
Flag: com.android.systemui.notification_animated_actions_treatment
Change-Id: I6d0f67a5b39989be6946b9fd4a15347c506d1abe