Fix grid Talkback can't focus on apply button

Video: https://drive.google.com/file/d/1l3JRwn8CLIZmYLaWXJ8LDl-D0N4jrQM4/view?usp=sharing&resourcekey=0-GwV7ni0R6b08J4xuajUuyA

Bug: 210800945
Test: Manual
Change-Id: I10d7eb8243a790a424aada476c7e8f0f5ecbd809
diff --git a/src/com/android/customization/picker/grid/GridFragment.java b/src/com/android/customization/picker/grid/GridFragment.java
index 9896edc..21a8108 100644
--- a/src/com/android/customization/picker/grid/GridFragment.java
+++ b/src/com/android/customization/picker/grid/GridFragment.java
@@ -182,6 +182,8 @@
         mBottomActionBar.showActionsOnly(APPLY_TEXT);
         mBottomActionBar.setActionClickListener(APPLY_TEXT,
                 v -> applyGridOption(mGridOptionViewModel.getSelectedOption()));
+        mBottomActionBar.setActionAccessibilityTraversalAfter(APPLY_TEXT,
+                mOptionsContainer.getId());
     }
 
     private void applyGridOption(GridOption gridOption) {