admin/setup new internal release pipeline (#1371)

Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>
Co-authored-by: Matthias Urhahn <matthias.urhahn@sap.com>

.pipeline/Jenkinsfile

+#!/usr/bin/env groovy
+
+@Library(['piper-lib', 'cwa-remote-pipelines']) _
+
+cwaAppAndroidPipeline script: this, customDefaults: ['cwa-mobile-clients-defaults.yml', 'android/cwa-app-android-config.yml']