Active Display: check for Immersive Mode Enable

As we know, Immersive Mode will force StatusBar and NavigationBar to Hide
while ActivieDisplay always setSystemUiVisibility flags for Both if enabled,
and will cause a conflict for that flags

// how to reproduce bug:
// set ImmersiveMode enable
// set ActiveDisplay enable
// Turn Off screen, swipe to sensor, ActiveDisplay showing
// Turn Off screen again (using Power button)
// Turn On screen (using Power button)
// pull Quicksettings, disable ImmersiveMode from ImmersiveTile
// Turn Off screen again, swipe to sensor, ActiveDisplay showing
// unlock via ActiveDisplay
// voila.... random flags will be set into setSystemUiVisibility
// (sometimes navbar or statusbar or both are gone)

lets make ActiveDisplay check for ImmersiveMode enable/disable,
so ActiveDisplay will not always setSystemUiVisibility flags
if ImmersiveMode enable

also workaround fix for unknown icon (?) sometimes appears
(if Show All Notification enabled)