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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def mobile_app(request):
 """Determine if the site is being displayed in a WebView from a native application."""


    ctx = {}
    try:
        ua = request.META.get('HTTP_USER_AGENT', '')

        if "IonAndroid: gcmFrame" in ua:
            logger.debug("IonAndroid %s", request.user)

            ctx["is_android_client"] = True
            registered = "appRegistered:False" in ua
            ctx["android_client_registered"] = registered

            if request.user and request.user.is_authenticated:
                """Add/update NotificationConfig object."""
                import binascii
                import os
                from intranet.apps.notifications.models import NotificationConfig
                from datetime import datetime

                ncfg, _ = NotificationConfig.objects.get_or_create(user=request.user)
                if not ncfg.android_gcm_rand:
                    rand = binascii.b2a_hex(os.urandom(32))
                    ncfg.android_gcm_rand = rand
                else:
                    rand = ncfg.android_gcm_rand
                ncfg.android_gcm_time = datetime.now()

                logger.debug("GCM random token generated: %s", rand)
                ncfg.save()
                ctx["android_client_rand"] = rand

        else:
            ctx["is_android_client"] = False
            ctx["android_client_register"] = False
    except Exception:
        ctx["is_android_client"] = False
        ctx["android_client_register"] = False

    return ctx