Correctly make to spec the color for "Turn on work apps" button and add stroke

- define color in base and quickstep

bug: 267975252
test: Manual - video: lightTheme: https://drive.google.com/file/d/1noY5Grq4jOxFIheL91KB_sOYRwp8XIyD/view?usp=sharing
test: darkTheme: https://drive.google.com/file/d/1o1uaTedAKbPy3BTG1GKJ0ldyHFs0-jGN/view?usp=sharing
Change-Id: I266b6624aa6f045c1f30c0db984fa9e1c5f6fe7e