Integración OneSignal y configuración HTTP nativo

- Configurar OneSignal con nuevo App ID
- Agregar network_security_config.xml para permitir HTTP
- Habilitar CapacitorHttp nativo en capacitor.config.ts
- Actualizar SDK a Android 34
- Configurar API_URL fija (192.168.10.207:8080)
- Agregar onesignal.service.ts

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

android/app/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+    <base-config cleartextTrafficPermitted="true">
+        <trust-anchors>
+            <certificates src="system" />
+        </trust-anchors>
+    </base-config>
+    <domain-config cleartextTrafficPermitted="true">
+        <domain includeSubdomains="true">192.168.10.207</domain>
+    </domain-config>
+</network-security-config>