Added ability to set the textAppearance on toolbar title

Needed this to fit the spec, but didn't want to move the google-sans
font into the support library as partners shouldn't need to use it.

Change-Id: If3a197dce6c77bcb120b4688ca623906ce14807d
Fixes: 79583581
Test: Built and flashed
(cherry picked from commit c435907690417d646819ddb5dbbaa5ab8c38d878)