Fix to reduce boxes shown in the Chinese localization

Set the LANG environment variable to the most recent UserWs registry
setting when starting flex or te, and change the explicit Arial and
Times New Roman font uses to select the actual font based on the system.
This addresses FWNX-947.

A number of timeout values for tests in the build system are adjusted
upwards to reflect experience building and testing these changes.  I have
no idea why font changes make seemingly unrelated tests run slower.

Change-Id: I406346c90ac38c915d6641db8d2d9d63a335a0f6