Fix font type and size for ProgressDialogMessage

This CL changes the font type and font size for
the style ProgressDialogMessage to match style
TextAppearance.WearMaterial.Body4 in SysUI

Restarting... before:
https://hsv.googleplex.com/4842145841152000

Restarting... after:
https://hsv.googleplex.com/6604982200565760

Shutting down... before:
https://hsv.googleplex.com/6247958430351360

Shutting down... after:
https://hsv.googleplex.com/6219525478416384

This also changes the font type and size of
"Resetting device" when factory resetting.

Screenshots from Main:
Restarting: https://hsv.googleplex.com/4716923032961024
Shutdown: https://hsv.googleplex.com/5951262274093056

Defer-CP-To-Master: 302265343
Test: manually check the strings
Bug: 301493816
Bug: 302265343
Change-Id: Ia66a315c61e76590959e0cdb34d48055444f3102
(cherry picked from commit e77f90175021c2abb37829ea04a45f297c15be6a)