How to fix auth/missing-android-pkg-name: Android Package Name required in Firebase

ActionCodeSettings actionCodeSettings = ActionCodeSettings.newBuilder()
    .setUrl("https://www.example.com/finishSignUp")
    .setHandleCodeInApp(true)
    .setAndroidPackageName(
        "com.example.android",  // Your Android package name
        true,                   // installIfNotAvailable
        "12"                    // minimumVersion (optional)
    )
    .build();

FirebaseAuth.getInstance()
    .sendSignInLinkToEmail(email, actionCodeSettings);

const actionCodeSettings = {
  url: 'https://www.example.com/finishSignUp',
  handleCodeInApp: true,
  android: {
    packageName: 'com.example.android',
    installApp: true,
    minimumVersion: '12'
  }
};

await auth.sendSignInLinkToEmail(email, actionCodeSettings);

final actionCodeSettings = ActionCodeSettings(
  url: 'https://www.example.com/finishSignUp',
  handleCodeInApp: true,
  androidPackageName: 'com.example.android',
  androidInstallApp: true,
  androidMinimumVersion: '12',
);

await FirebaseAuth.instance.sendSignInLinkToEmail(
  email: email,
  actionCodeSettings: actionCodeSettings,
);

android {
    defaultConfig {
        applicationId "com.example.android"  // This is your package name
        // ...
    }
}

ActionCodeSettings actionCodeSettings = ActionCodeSettings.newBuilder()
    .setUrl("https://www.example.com/finishSignUp")
    .setHandleCodeInApp(true)
    .build();

ActionCodeSettings actionCodeSettings = ActionCodeSettings.newBuilder()
    // Required: URL where the link should redirect
    .setUrl("https://www.example.com/finishSignUp?email=" + email)

    // Required for email link authentication
    .setHandleCodeInApp(true)

    // Android configuration (all three parameters)
    .setAndroidPackageName(
        "com.example.android",  // Package name (REQUIRED if using Android settings)
        true,                   // Install if not available
        "12"                    // Minimum version
    )

    // iOS configuration (optional)
    .setIOSBundleId("com.example.ios")

    // Optional: Additional state/context
    .setDynamicLinkDomain("example.page.link")
    .build();

try {
    FirebaseAuth.getInstance()
        .sendSignInLinkToEmail(email, actionCodeSettings)
        .addOnCompleteListener(task -> {
            if (task.isSuccessful()) {
                Log.d("Auth", "Email link sent successfully");
            }
        });
} catch (Exception e) {
    Log.e("Auth", "Failed to send email link: " + e.getMessage());
}