compositor-wayland: Call notify_pointer_focus() for content area only
compositor-wayland: Call notify_pointer_focus() for content area only

We don't want to send enter/leave events to the compositor when the pointer
enters the surface, only when the pointer enters the content area.  This
avoids hiding the cursor when entering the frame and sending out-of-bounds
coordinates to notify_pointer_focus().

jonnylamb/weston,udoprog/weston,krezovic/weston,mchalupa/weston,mchalupa/weston,eyolfson/weston,xorgy/weston,Fantu/compositor-spice,udoprog/weston,Gnurou/weston,xorgy/weston,Fantu/compositor-spice,eyolfson/weston,Tarnyko/weston-xdg_surface_present,krezovic/weston,sir-murray/weston,giucam/weston,Gnurou/weston,giucam/weston,kwm81/weston,Tarnyko/weston-xdg_surface_present,jonnylamb/weston,Fantu/compositor-spice,sir-murray/weston,kwm81/weston