Adding feature flag for simulating two CellLayouts using one.

Bug: 188081026
Test: compiles
Change-Id: Idd9ad8c6d0e4814d93fc9dd019e250d9469020d8
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index 5cab817..94cd1be 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -334,6 +334,10 @@
             "FORCE_PERSISTENT_TASKBAR", false, "Forces taskbar to be persistent, even in gesture"
                     + " nav mode and when transient taskbar is enabled.");
 
+    public static final BooleanFlag FOLDABLE_SINGLE_PAGE = getDebugFlag(
+            "FOLDABLE_SINGLE_PAGE", false,
+            "Use a single page for the workspace");
+
     public static final BooleanFlag ENABLE_TRANSIENT_TASKBAR = getDebugFlag(
             "ENABLE_TRANSIENT_TASKBAR", false, "Enables transient taskbar.");