Unfolded Two Pane Widget Picker Prototype

As described, this is a small prototype to show what the current state of the two pane widget picker would look like in an unfolded foldable.

Bug: 301918659
Test: N/A
Flag: UNFOLDED_WIDGET_PICKER
Change-Id: Ia495de39a470f1dccf70ce53e59c7929525c4a00

src/com/android/launcher3/config/FeatureFlags.java

@@ -172,6 +172,10 @@ public final class FeatureFlags {
             "LARGE_SCREEN_WIDGET_PICKER", ENABLED, "Enable new widget picker that takes "
                     + "advantage of large screen format");
 
+    public static final BooleanFlag UNFOLDED_WIDGET_PICKER = getDebugFlag(301918659,
+            "UNFOLDED_WIDGET_PICKER", DISABLED, "Enable new widget picker that takes "
+                    + "advantage of the unfolded foldable format");
+
     public static final BooleanFlag MULTI_SELECT_EDIT_MODE = getDebugFlag(270709220,
             "MULTI_SELECT_EDIT_MODE", DISABLED, "Enable new multi-select edit mode "
                     + "for home screen");

src/com/android/launcher3/widget/picker/WidgetsFullSheet.java

@@ -60,6 +60,7 @@ import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.compat.AccessibilityManagerCompat;
+import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.model.UserManagerState;
 import com.android.launcher3.model.WidgetItem;
 import com.android.launcher3.pm.UserCache;
@@ -681,7 +682,8 @@ public class WidgetsFullSheet extends BaseWidgetSheet
         boolean isTwoPane = LARGE_SCREEN_WIDGET_PICKER.get()
                 && launcher.getDeviceProfile().isTablet
                 && launcher.getDeviceProfile().isLandscape
-                && !launcher.getDeviceProfile().isTwoPanels;
+                && (!launcher.getDeviceProfile().isTwoPanels
+                    || FeatureFlags.UNFOLDED_WIDGET_PICKER.get());
 
         WidgetsFullSheet sheet;
         if (isTwoPane) {