feat: MVP implementation - Kiosk Browser

- Fullscreen WebView with immersive mode
- URL whitelist system
- Admin PIN-protected settings
- Boot receiver for auto-launch
- Idle timeout with homepage reset
- Lock Task Mode support
- Material Design 3 UI

Team: Pluto (coordinator), Margaret, Spirit

app/src/main/kotlin/farm/hobbs/kioskbrowser/KioskDeviceAdminReceiver.kt

@@ -0,0 +1,15 @@
+package farm.hobbs.kioskbrowser
+
+import android.app.admin.DeviceAdminReceiver
+import android.content.Context
+import android.content.Intent
+
+class KioskDeviceAdminReceiver : DeviceAdminReceiver() {
+    override fun onEnabled(context: Context, intent: Intent) {
+        super.onEnabled(context, intent)
+    }
+
+    override fun onDisabled(context: Context, intent: Intent) {
+        super.onDisabled(context, intent)
+    }
+}