Optimize SYSUI_STATE_NOTIFICATION_PANEL_VISIBLE flag update frequency

Bug: 275121752
Test: Manual, i.e. observe Taskbar behaviour when pulling down notification shade and expanding quick settings
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:9bceeb3fdb2c003ddf79d71191bd0447ab4689ff)
Change-Id: Id66485e7d717dd0ea1ef17904d33aca7b98043c6