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: Ie8e44df42ed8b5ce5ea0efd92730c52905a774b9
1 file changed