Fix bug on High Contrast Text : where DarkTheme is enabled &&

ForceDarkAllowed is true.

In this condition, text seems be bold so far.
From now, in this case, text would have black outline, white inline
color.

this is related to
https://partnerissuetracker.corp.google.com/u/1/issues/175363190.

Change-Id: Icf0048ef8d55c2e29676944c24c2050f531616d5
Merged-In: Icf0048ef8d55c2e29676944c24c2050f531616d5