Slightly reduce number of cfgs (#3071)

* Make Linux platforms less dependent on the root monitor handle

* Add various functions to the Wayland platform to reduce cfgs

* Don't use a cfg in listen_device_events

* Don't use a cfg in set_content_protected

* Fix instance of a target_os cfg

src/platform_impl/orbital/event_loop.rs

@@ -15,7 +15,7 @@ use raw_window_handle::{OrbitalDisplayHandle, RawDisplayHandle};
 use crate::{
     error::EventLoopError,
     event::{self, Ime, Modifiers, StartCause},
-    event_loop::{self, ControlFlow},
+    event_loop::{self, ControlFlow, DeviceEvents},
     keyboard::{
         Key, KeyCode, KeyLocation, ModifiersKeys, ModifiersState, NativeKey, NativeKeyCode,
     },
@@ -765,6 +765,9 @@ impl<T: 'static> EventLoopWindowTarget<T> {
         v
     }
 
+    #[inline]
+    pub fn listen_device_events(&self, _allowed: DeviceEvents) {}
+
     pub fn raw_display_handle(&self) -> RawDisplayHandle {
         RawDisplayHandle::Orbital(OrbitalDisplayHandle::empty())
     }