[DocumentsUITests]FileManagementUiTest#testCopyLargeAmountOfFiles Fail

Action will not be performed because the target view does not match
at least 90 percent of the view's area is displayed to the user.
Root Cause:
  - dropdown_sort_widget height : 60dp
  - Button height : 48dp
  - 48dp/60dp = 80%
HierarchyView :
    dropdown_sort_widget height : 210
    sort_dimen_dropdown : 168
    168/210 = 80%

Solution:
    Adjust dropdown_sort_widget_size from 48dp to 54dp
    Then 54/60 = 90%

Bug: 112064049
Test: atest DocumentsUITests:FileManagementUiTest#testCopyLargeAmountOfFiles
Change-Id: I915099a516650b6f3b7f4fae357156901f867955
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 122b669..e6ab69a 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -54,7 +54,7 @@
     <dimen name="doc_header_height">60dp</dimen>
 
     <dimen name="dropdown_sort_widget_margin">12dp</dimen>
-    <dimen name="dropdown_sort_widget_size">48dp</dimen>
+    <dimen name="dropdown_sort_widget_size">54dp</dimen>
     <dimen name="dropdown_sort_text_size">18sp</dimen>
 
     <dimen name="drop_icon_height">14dp</dimen>