feat: support flat and elevated mode #3799
Merged
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Fixes: #3790
Summary
Related issue
Introducing prop
mode
to theSurface
component with two possible optionselevated
(default) andflat
.The
flat
mode indicates theSurface
component will have the background color appropriate to the set level, however, it will not have ashadow
.Test plan
New prop
mode
covered by unit tests.