Fixing dual tone shade in split shade mode

Instead of reacting only on quick settings height change,
now NotificationPanelViewController sets bounds (both x and y)
where notification background should appear

Test: Manual + NotificationPanelViewTest + Presubmit
Bug: 185110525
Change-Id: I4e00d75174ace08edbda40e803907edcee73a5bf
4 files changed