public boolean isAvailableOffline() {
                return (mFlags & FLAG_AVAILABLE_OFFLINE) != 0;
            }
Get whether this action is available when the wearable device is not connected to
a companion device. The user can still trigger this action when the wearable device
is offline, but a visual hint will indicate that the action may not be available.
Defaults to true.
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/compat/NotificationCompat.java