Summary:
Make sure mobile client and sonar desktop app keep debugger mode in sync
Desktop client listens to available modes and currently selected mode which is what we use here.
Later we can tweak the logic to try to restore last mode if desktop or mobile clients crash / disconnect etc
Reviewed By: lblasa
Differential Revision: D49384358
fbshipit-source-id: 5bc1f4240253b68a746dfa5feba4b352f4e261a2
3f0e1f76d5