Add SharedPreferences key for reverse

Bug: 151127557
Test: manual
Change-Id: I86fd156eeab4f585207b1aabc044fea3eca832db
diff --git a/packages/SystemUI/src/com/android/systemui/Prefs.java b/packages/SystemUI/src/com/android/systemui/Prefs.java
index 87990cd..ced77be 100644
--- a/packages/SystemUI/src/com/android/systemui/Prefs.java
+++ b/packages/SystemUI/src/com/android/systemui/Prefs.java
@@ -74,6 +74,7 @@
             Key.HAS_SEEN_ODI_CAPTIONS_TOOLTIP,
             Key.HAS_SEEN_BUBBLES_EDUCATION,
             Key.HAS_SEEN_BUBBLES_MANAGE_EDUCATION,
+            Key.HAS_SEEN_REVERSE_BOTTOM_SHEET,
             Key.CONTROLS_STRUCTURE_SWIPE_TOOLTIP_COUNT
     })
     public @interface Key {
@@ -122,6 +123,7 @@
         String HAS_SEEN_ODI_CAPTIONS_TOOLTIP = "HasSeenODICaptionsTooltip";
         String HAS_SEEN_BUBBLES_EDUCATION = "HasSeenBubblesOnboarding";
         String HAS_SEEN_BUBBLES_MANAGE_EDUCATION = "HasSeenBubblesManageOnboarding";
+        String HAS_SEEN_REVERSE_BOTTOM_SHEET = "HasSeenReverseBottomSheet";
         String CONTROLS_STRUCTURE_SWIPE_TOOLTIP_COUNT = "ControlsStructureSwipeTooltipCount";
         /** Tracks whether the user has seen the onboarding screen for priority conversations */
         String HAS_SEEN_PRIORITY_ONBOARDING = "HasSeenPriorityOnboarding";