We made a little progress. We were able to build the Android app. Now we see this issue when the app is installed and started to run:
Two issues briefly mentioned here.
The configs we fields we considered are:
 remove the unused library, this library is intended for crash report and it's note related to Gluu flow.
transitive = true;
Then the certs were created using:
Basically online tools were used for cert generation as described below:
-Generate X509 certificates online: https://www.samltool.com/self_signed_certs.php
-Format private key thành string (hex??): https://www.samltool.com/format_privatekey.php
-Format public cert (X509) thành string (hex??): https://www.samltool.com/format_x509cert.php
Issue observed when running the app in debug mode
The result is: we could run the app but the debug console is showing error about the SSL cert.
error:0c0000a2:ASN.1 encoding routines:OPENSSL_internal:NOT_ENOUGH_DATA
To test the built and installed super gluu android app, the following was done.
 enabled super gluu for oxTrust in the Configuuration->Manage Authentication->Default Authentication method after enabling super gluu auth script
 created a user account
 Hit the Gluu server admin portal url
 logged in using user account credentials
Then saw an option to scan QR code. Used scan QR code and scanned using the built Androd app.
Then saw Aprove/ Deny option for authentication
Issue illustration with logs:
 When authentication was chosen in the built Android app, the following error was seen on Android app:
Invalid Token. Fido U2F token response is invalid
These are the Android debugging logs
Parsing datetime issue: E/org.gluu.super_gluu.app.fragment.RequestDetailFragment: Failed to parse ISO date/time: 2022-01-12T04:37:29Z java.text.ParseException: Unparseable date: "2022-01-12T04:37:29Z"
Parsing ceritifcate issue:E/cert-utils: Failed to parce ceritifcatejava.security.cert.CertificateException: com.android.org.conscrypt.OpenSSLX509CertificateFactory$ParsingException: com.android.org.conscrypt.OpenSSLX509CertificateFactory$ParsingException: java.lang.RuntimeException: error:0c0000a2:ASN.1 encoding routines:OPENSSL_internal:NOT_ENOUGH_DATA