[App] Add notifications for hotkeys & XNotifyQueueUI

src/xenia/hid/input_system.cc

@@ -140,6 +140,8 @@ X_RESULT InputSystem::GetKeystroke(uint32_t user_index, uint32_t flags,
   return any_connected ? X_ERROR_EMPTY : X_ERROR_DEVICE_NOT_CONNECTED;
 }
 
+bool InputSystem::GetVibrationCvar() { return cvars::vibration; }
+
 void InputSystem::ToggleVibration() {
   OVERRIDE_bool(vibration, !cvars::vibration);
   // Send instant update to vibration state to prevent awaiting for next tick.

src/xenia/hid/input_system.h

@@ -47,6 +47,8 @@ class InputSystem {
   X_RESULT GetKeystroke(uint32_t user_index, uint32_t flags,
                         X_INPUT_KEYSTROKE* out_keystroke);
 
+  bool GetVibrationCvar();
+
   void ToggleVibration();
 
   const std::bitset<max_allowed_controllers> GetConnectedSlots() const {