afohrman 594e5cd446 Add missing attributes to button res/public.xml.
Adds the following attributes:
-iconGravity
-checkedButton

This commit also:
- deletes iconTintMode, which is not declared in the button package and does not need to be included in the list of attributes in public.xml
- rearranges the ordering of the attributes for clarity

PiperOrigin-RevId: 294018694
2020-02-10 10:00:47 -05:00
..