autoclick: Update indicator view theme when system theme is changed

Verified this change on DUT since the theme change still use the same
color token.
screencast: http://go/scrcast/NDYzNzQzMzk2OTc3MDQ5NnxjMWU3YThlZi1iNQ

Bug: 427508232
Test: atest AutoclickControllerTest, manually verified on DUT
Flag: com.android.server.accessibility.enable_autoclick_indicator
Change-Id: I7d80b288bf8b7c31979e464a60cc5cf333f9dfa6