display(visionOS): disable background auto-suspend on visionOS

The auto-suspend can trigger any time user does not focus on view.

Platform/iOS/Settings.bundle/Root.plist

@@ -25,6 +25,8 @@
 			<array>
 				<string>iOS-Remote</string>
 			</array>
+			<key>Platform</key>
+			<string>iOS</string>
 		</dict>
 		<dict>
 			<key>Type</key>
@@ -35,6 +37,8 @@
 			<string>AutosaveBackground</string>
 			<key>DefaultValue</key>
 			<true/>
+			<key>Platform</key>
+			<string>iOS</string>
 		</dict>
 		<dict>
 			<key>Type</key>

Platform/iOS/VMSessionState.swift

@@ -499,6 +499,7 @@ extension VMSessionState {
     }
     
     func didEnterBackground() {
+        #if !os(visionOS)
         logger.info("Entering background")
         let shouldAutosaveBackground = UserDefaults.standard.bool(forKey: "AutosaveBackground")
         if shouldAutosaveBackground && vmState == .started {
@@ -521,14 +522,17 @@ extension VMSessionState {
                 task = .invalid
             }
         }
+        #endif
     }
     
     func didEnterForeground() {
+        #if !os(visionOS)
         logger.info("Entering foreground!")
         if (hasAutosave && vmState == .started) {
             logger.info("Deleting snapshot")
             vm.requestVmDeleteState()
         }
+        #endif
     }
 }