Adding the haptic_volume_slider flag

Test: make
Bug: 316953430
Flag: ACONFIG haptic_volume_slider DEVELOPMENT
Change-Id: Iadbb6ece4c551d45608a34b5665685867a190e27
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index eaa6d07..8fb59ff 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -254,3 +254,10 @@
         "prefer using alpha to distinguish network activity."
     bug: "310715220"
 }
+
+flag {
+    name: "haptic_volume_slider"
+    namespace: "systemui"
+    description: "Adds haptic feedback to the volume slider."
+    bug: "316953430"
+}