Make some layout values in action button in notification configurable

This CL makes some layout values in action button configurable by config
xmls (colors.xml, dimens.xml and styles.xml).

With this, we can remove the customized layout xmls from ARC branches and
share these xmls by just customizing values.

Bug: 110384234
Test: Manual (see the notification with action buttons in walleye)
Change-Id: I14081c5a7346d9d23780752ae8750ff36f74341d