Create new @RequiresDesktopDevice annotation.

and annotate all desktop mode functional and Flicker tests with the new
annotation so that we can selectively run these tests on the test infra
at the config level.

Fixes: 434865938
Flag: EXEMPT test refactoring
Test: EXEMPT adding test annotation
Change-Id: I9180cc4ebcd7473ee4c5d2342d83ec3f886722af