Update Toast UI component according to UX reference spec

The color, size, background radius, font, and padding have all been
changed to reflect the UX specs.

Bug: 203815193
Test: Manual

Change-Id: I9cf7ae1e4afb5d383f5c99c61e6954e2c1929bc7
(cherry picked from commit 314b4823b5a99acb3fd06dbf9e66818ea0de9b9e)
3 files changed