Wolvic expose media apis

[mshin-wolvic]

Support fullscreen & media control

This CL exposes fullscreen and media APIs to Java layer to support fullcreen and media control.

• Add setWebContentsDelegate in tab jni to enter/exit fullcreen
• Expose scrubTo(=fast seek)/setMute to Java layer
• Add a |isActive| parameter to determind the media start/stop status
• Add //components/browser_ui/media/* in gn to handle the artwork's images