Update radio/switch styles for Fluent theme

[StefanIvanov]

The enabled radio that is on/checked should use the primary 500 instead of 300
The enabled radio that is on/checked should use the primary 900 for hover on both border and dot instead of 500
The enabled radio that is off/unchecked should use the gray 900 instead of 800
The enabled radio that is off/unchecked should use gray 700 for the hover dot instead of primary 500, outside border should remain gray 900
The focus-outline color should be gray 700 instead of gray 800

The enabled switch hover color should use primary 900 instead of 800
The focus-outline color should be gray 700 instead of gray 800