fix. launchApp function

[RohitKushvaha01]

The previously used method of launching apps via getLaunchIntentForPackage() is very limited and often doesn't work due to privacy restrictions in Android 11 and above. This PR fixes the issue by explicitly providing the activity class name to the intent. It also sends a string extra if provided. The target app should be aware of this, allowing plugins to send data to supported apps.

this is the new signature

/**
   * Launches and app
   * @param app the package name of the app
   * @param className the full class name of the activity
   * @param data Data to pass to the app
   * @param onSuccess
   * @param onFail
   */
  launchApp(
    app: string,
    className: string,
    data: string,
    onSuccess: OnSuccessBool,
    onFail: OnFail,
  ): void;

Example Uses:

system.launchApp(
  "com.example.targetapp",                 // app package name
  "com.example.targetapp.MainActivity",    // full activity class name
  "some string data to send",              // optional string data
  (success) => {
   console.log("App launched successfully!");
  },
  (error) => {
    console.error("Failed to launch app:", error);
  }
);

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