Update v9.2.0: Enhanced UI and generic update messages

- Incremented version to 9.2.0 (versionCode: 92000)
- Simplified update dialog buttons: "Actualizar ahora" → "Actualizar"
- Changed "Cerrar aplicación" to "Salir" for better UX
- Maintained security and device management features
- Improved user interface text for better user experience

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/build.gradle

@@ -8,8 +8,8 @@ android {
         applicationId "com.streamplayer"
         minSdk 21
         targetSdk 33
-        versionCode 91020
-        versionName "9.1.2"
+        versionCode 92000
+        versionName "9.2.0"
         buildConfigField "String", "DEVICE_REGISTRY_URL", '"http://194.163.191.200:4000"'
     }