clipboard: Introduce ArcClipboardMonitor

This CL adds ArcClipboardMonitor to implement the clipboard integration
for the ARC environment.
This CL should not affect behavior outside of the ARC environment.

Bug: 325866197
Test: manual - integration test on ARC env
Flag: NA
Change-Id: I0446dc6e643c545c9e370f108bc1ac88d15f769e