Add flag for widgets in Launcher preview

Test: Flag available in developer options (does nothing)
Bug: 185306338
Change-Id: I74063d0ef29f828f740633ce0dab860672f69d3d
Merged-In: I74063d0ef29f828f740633ce0dab860672f69d3d
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index f066dc1..3695347 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -254,6 +254,10 @@
             "ENABLE_WALLPAPER_SCRIM", false,
             "Enables scrim over wallpaper for text protection.");
 
+    public static final BooleanFlag WIDGETS_IN_LAUNCHER_PREVIEW = getDebugFlag(
+            "WIDGETS_IN_LAUNCHER_PREVIEW", false,
+            "Enables widgets in Launcher preview for the Wallpaper app.");
+
     public static void initialize(Context context) {
         synchronized (sDebugFlags) {
             for (DebugFlag flag : sDebugFlags) {