Add flag for One Search support in Taskbar All Apps.

Test: No
Bug: 216683257
Change-Id: I7a705827f165f60c444bb27c55cdfb6b635215d2
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index 8b2184d..993431e 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -246,6 +246,10 @@
             "ENABLE_ALL_APPS_IN_TASKBAR", true,
             "Enables accessing All Apps from the system Taskbar.");
 
+    public static final BooleanFlag ENABLE_ALL_APPS_ONE_SEARCH_IN_TASKBAR = getDebugFlag(
+            "ENABLE_ALL_APPS_ONE_SEARCH_IN_TASKBAR", false,
+            "Enables One Search box in Taskbar All Apps.");
+
     public static final BooleanFlag ENABLE_SPLIT_FROM_WORKSPACE = getDebugFlag(
             "ENABLE_SPLIT_FROM_WORKSPACE", true,
             "Enable initiating split screen from workspace.");