floss: Modify connectable during suspend

If there are no HID devices capable of waking the system, we should mark
the device as not connectable during suspend and restore connectable
after suspend.

Bug: b:275572349
Tag: #floss
Test: Suspend; verify page scan disabled if no classic mouse/keyboard
Change-Id: I54009e67c3489203321995afad05fc252615cdd8