Revert "flip app shortcut popup design on for U"

This reverts commit 5d8489e71e3f3ede301af695b9793078df1b91ae.

Reason for revert: regression test failures b/273135788 b/272838823

Change-Id: I8b4747b8b714820648f7816f4b2ea962da5d332c
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index e5cdd6e..e8ef342 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -302,7 +302,7 @@
                     + " is enabled or in prefix state");
 
     public static final BooleanFlag ENABLE_MATERIAL_U_POPUP = getDebugFlag(270395516,
-            "ENABLE_MATERIAL_U_POPUP", true, "Switch popup UX to use material U");
+            "ENABLE_MATERIAL_U_POPUP", false, "Switch popup UX to use material U");
 
     public static final BooleanFlag ENABLE_SEARCH_UNINSTALLED_APPS = getReleaseFlag(270395269,
             "ENABLE_SEARCH_UNINSTALLED_APPS", false, "Search uninstalled app results.");