Segunda revisión completa: fixes críticos aplicados

- StrictMode solo en DEBUG mode
- ExecutorService con shutdown apropiado
- DNSSetter NetworkCallback unregister
- DiffUtil en ChannelAdapter y EventAdapter
- minifyEnabled=true y shrinkResources=true para release
- Validación en constructores (StreamChannel)
- Strings externalizadas
- ProGuard rules completas
- Testing dependencies agregadas
- Removed Firebase (uso personal)
- JavaDoc documentación agregada
- Android SDK configurado localmente

Compilado exitosamente: StreamPlayer v9.4.2 debug APK (11MB)

dashboard/data/devices.json

@@ -0,0 +1,26 @@
+[
+  {
+    "deviceId": "f91f2668e8dfb2a7",
+    "alias": "",
+    "deviceName": "SM-S928B",
+    "model": "SM-S928B",
+    "manufacturer": "Samsung",
+    "osVersion": "16 (API 36)",
+    "appVersionName": "9.4.1",
+    "appVersionCode": 94100,
+    "firstSeen": "2025-11-23T22:31:13.359Z",
+    "lastSeen": "2025-11-23T23:11:07.215Z",
+    "blocked": false,
+    "notes": "",
+    "installs": 7,
+    "ip": "181.23.253.20",
+    "country": "AR",
+    "verification": {
+      "clientPart": "1714c2bb93670c3f",
+      "adminPart": "9924c7049211c58c",
+      "status": "verified",
+      "createdAt": "2025-11-23T22:31:13.359Z",
+      "verifiedAt": "2025-11-23T22:33:11.942Z"
+    }
+  }
+]