public WearableExtender setAvailableOffline(boolean availableOffline) {
                setFlag(FLAG_AVAILABLE_OFFLINE, availableOffline);
                return this;
            }
Set 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