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/node_modules/nodemon/lib/monitor/signals.js

@@ -0,0 +1,34 @@
+module.exports = {
+  SIGHUP: 1,
+  SIGINT: 2,
+  SIGQUIT: 3,
+  SIGILL: 4,
+  SIGTRAP: 5,
+  SIGABRT: 6,
+  SIGBUS: 7,
+  SIGFPE: 8,
+  SIGKILL: 9,
+  SIGUSR1: 10,
+  SIGSEGV: 11,
+  SIGUSR2: 12,
+  SIGPIPE: 13,
+  SIGALRM: 14,
+  SIGTERM: 15,
+  SIGSTKFLT: 16,
+  SIGCHLD: 17,
+  SIGCONT: 18,
+  SIGSTOP: 19,
+  SIGTSTP: 20,
+  SIGTTIN: 21,
+  SIGTTOU: 22,
+  SIGURG: 23,
+  SIGXCPU: 24,
+  SIGXFSZ: 25,
+  SIGVTALRM: 26,
+  SIGPROF: 27,
+  SIGWINCH: 28,
+  SIGIO: 29,
+  SIGPWR: 30,
+  SIGSYS: 31,
+  SIGRTMIN: 35,
+}