Fix nit in LocaleDataTest#testInvalidLocale and StringTest#testFormat_invalidLocale

The test were introduced by afe00b2f2be215ce74f920363a47daafb6e907ff
(http://r.android.com/944499)

Test: LocaleDataTest
Test: StringTest
Bug: 129070579
Change-Id: If2d1c88705ab6a8e3cc855f6a957ffc33641dc84
2 files changed