[play] Add feature flag for play.

Bug: 260712395
Test: manual
Change-Id: Ib96ab0789e0648fdc311f31f52b9867fe0253a69
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index a24b30f..fe1e4d2 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -322,6 +322,9 @@
     public static final BooleanFlag POPUP_MATERIAL_U = new DeviceFlag(
             "POPUP_MATERIAL_U", false, "Switch popup UX to use material U");
 
+    public static final BooleanFlag ENABLE_SEARCH_UNINSTALLED_APPS = new DeviceFlag(
+            "ENABLE_SEARCH_UNINSTALLED_APPS", false, "Search uninstalled app results.");
+
     public static final BooleanFlag SHOW_HOME_GARDENING = getDebugFlag(
             "SHOW_HOME_GARDENING", false,
             "Show the new home gardening mode");