Android patch: Disable ar_XB in cintltst.tsutil.cldrtest.VerifyTranslation

ar_XB is generated and used by developers only, not by mass users.

The error message is not very alarming because I think not all
characters used in a locale have to be in exemplar characters.
More investigation is needed.

Test: atest CtsIcu4cTestCases
Change-Id: Ie0e9106fb1048fcb2d5ee2ab9a83ed452ead1e0f
1 file changed