Fix snooze not dismissing when it should

Simply check whether the guts is a leavebehind, if it is allow it to
be dismissed.

Test: manual - snooze a notification, touch outside note that it disappears
             - show notification controls on a notification that will
               be removed, note that the controls remain, once 'done' is
               hit the notification is removed
Bug: 63788509
Change-Id: I42c97239f4e3e17f2e69322c94bd8e8f9d7f0737

packages/SystemUI/src/com/android/systemui/statusbar/NotificationGuts.java

@@ -329,4 +329,8 @@ public class NotificationGuts extends FrameLayout {
     public boolean isExposed() {
         return mExposed;
     }
+
+    public boolean isLeavebehind() {
+        return mGutsContent != null && mGutsContent.isLeavebehind();
+    }
 }

packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java

@@ -1790,7 +1790,8 @@ public class StatusBar extends SystemUI implements DemoMode,
             return;
         }
         if (entry != null && mNotificationGutsExposed != null
-                && mNotificationGutsExposed == entry.row.getGuts()) {
+                && mNotificationGutsExposed == entry.row.getGuts() && entry.row.getGuts() != null
+                && !entry.row.getGuts().isLeavebehind()) {
             Log.w(TAG, "Keeping notification because it's showing guts. " + key);
             mLatestRankingMap = ranking;
             mKeyToRemoveOnGutsClosed = key;