[duet] Move overflow menu higher

From https://gallery.googleplex.com/projects/MCHbtQVoQ2HCZVGcxnB8fbou/files/MCEJu8Y2hyDScU0HXgbgxLFDny2Xg0-sdc8
The padding below menu should be 12dp(padding below icon) + 24dp(icon height) + 8dp(padding between menu and icon)

Bug: 1011061
Change-Id: I30b9c5efbef46b071fbdf3fda831b098aac043c3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1894050Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Gang Wu <gangwu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#711876}

chrome/android/java/res/values/dimens.xml

@@ -62,7 +62,7 @@
          via scrolling. -->
     <dimen name="menu_vertical_fade_distance">15dp</dimen>
     <dimen name="menu_badge_translation_y_distance">6dp</dimen>
-    <dimen name="menu_negative_vertical_offset_not_top_anchored">8dp</dimen>
+    <dimen name="menu_negative_vertical_offset_not_top_anchored">44dp</dimen>
 
     <!-- Menu button dragging related dimensions -->
     <dimen name="auto_scroll_full_velocity">500dp</dimen>