Maximized window does not need to set its size on application side.
Because of the unnecessary line setting window size, application could get a
black screen for around 2 seconds by window mananger policy.
Please refer to following steps.
(1) Wearable image > contacts > select one item > message button
(2) After step (1), edit message, then added message is not visible because its
window size becomes 1000 * 1000 on 360 * 360 wearable screen.