Add animateNavBarLongPress to SystemUiProxy and ANIMATE_LPNH flag

Bug: 306400785
Bug: 308693847
Test: Manual
Flag: LEGACY ANIMATE_LPNH TEAMFOOD
Change-Id: I996c923e5a1949e6219f900da12e2b5091597750
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index c0d0662..c2c73c7 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -119,6 +119,10 @@
             getReleaseFlag(301680992, "CUSTOM_LPNH_THRESHOLDS", DISABLED,
                     "Add dev options to customize the LPNH trigger slop and milliseconds");
 
+    public static final BooleanFlag ANIMATE_LPNH =
+            getReleaseFlag(308693847, "ANIMATE_LPNH", TEAMFOOD,
+                    "Animates navbar when long pressing");
+
     public static final IntFlag LPNH_SLOP_PERCENTAGE =
             getIntFlag(301680992, "LPNH_SLOP_PERCENTAGE", 100,
                     "Controls touch slop percentage for lpnh");