private @Nullable PendingIntent getSessionIdFromBundle(@Nullable Bundle bundle) {
            if (bundle == null) return null;

            PendingIntent sessionId = bundle.getParcelable(CustomTabsIntent.EXTRA_SESSION_ID);
            bundle.remove(CustomTabsIntent.EXTRA_SESSION_ID);
            return sessionId;
        }
File is a splash image to be shown on top of a Trusted Web Activity while the web contents
are loading.
customtabs/src/android/support/customtabs/CustomTabsService.java