Review comments followup

These are review comments followup from ag/17399997

Bug: b/218187058
Test: manually test thet Launcher3 features work correctly
Change-Id: I9865a37c1ed663370dc28e7678994f3d961e3cd1
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index f7133c4..87bbac6 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -1203,7 +1203,7 @@
             return getContext().getString(R.string.move_to_hotseat_position,
                     Math.max(cellX, cellY) + 1);
         } else {
-            Workspace workspace = getWorkspace();
+            Workspace<?> workspace = getWorkspace();
             int row = cellY + 1;
             int col = workspace.mIsRtl ? mCountX - cellX : cellX + 1;
             int panelCount = workspace.getPanelCount();
@@ -1217,7 +1217,7 @@
         }
     }
 
-    private Workspace getWorkspace() {
+    private Workspace<?> getWorkspace() {
         return Launcher.cast(mActivity).getWorkspace();
     }