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[SB][Notif] Stop HUN animation at status bar if HUN has notif chip.
If a notification has a status bar chip, we don't want the HUN animation to cover that chip. This is especially obvious if you tap the status bar chip to show the HUN, but in general we don't want the HUN to obscure the chip. This CL does this by having NotificationStackScrollLayoutController maintain a list of currently visible chips. - For the appear animation, the new HeadsUpAnimationEvent class stores whether there's a status bar chip and StackStateAnimator uses it. - For the disappear animation, we set the status bar chip status on the ExpandableNotificationRow and StackScrollAlgorithm uses it. This also should be pretty extensible if we later want the HUN appear animation to come from the chip or the HUN disappear animation to return back into the chip. Fixes: 393369891 Bug: 364653005 Flag: com.android.systemui.status_bar_notification_chips Test: Send promoted notification, tap status bar chip -> verify HUN animation starts and stops at the status bar height for both folded & unfolded Test: Trigger normal HUN -> verify HUN animation goes on top of status bar like usual Test: Tap status bar chip then open that notification's app -> verify HUN disappear animation goes on top of status bar like usual Test: Trigger a promoted notification HUN while that app is visible, then close app before HUN animates away -> verify HUN disappear animation stops at status bar Test: atest HeadsUpAnimatorTest StackStateAnimatorTest StackScrollAlgorithmTest Change-Id: Ib170238f2e2084120777ae2885e64d8e7b2eb68b