Use Locale.US for formatting numbers.

Specify Locale.US when formatting machine-readable numbers. This is to
avoid the default locale changing how these are formatted (e.g. in file
names).

Bug: 174120008
Test: atest FileUtilsTest#testBuildUniqueFile_DCF_strict_differentLocale
Test: atest FileUtilsTest#testBuildUniqueFile_DCF_relaxed_differentLocale
Test: atest MediaProviderTest#testBuildData_Pending_FromValues_differentLocale
Test: atest MediaProviderTest#testBuildData_Trashed_FromValues_differentLocale
Change-Id: Ifacc4f566b14a817a0985023e8f410c78b1a99b4
3 files changed