Enable XR Preview Mode for PICO OS

Supported features in the immersive preview mode
- Passthrough
- Hand tracking
Notes:
- Multi-window is only available for internal apps on PICO OS, therefore launching adjacent windows is not possible currently.
- Passthrough splash screen is not supported on PICO OS

platform/android/java/lib/src/org/godotengine/godot/utils/DeviceUtils.kt

@@ -44,9 +44,16 @@ fun isHorizonOSDevice(): Boolean {
 	return "Oculus".equals(Build.BRAND, true)
 }
 
+/**
+ * Returns true if running on PICO OS.
+ */
+fun isPicoOSDevice(): Boolean {
+	return ("Pico".equals(Build.BRAND, true))
+}
+
 /**
  * Returns true if running on a native Android XR device.
  */
 fun isNativeXRDevice(): Boolean {
-	return isHorizonOSDevice()
+	return isHorizonOSDevice() || isPicoOSDevice()
 }