Fix bootloop issue with UsageStatsService.

When the configurations are being read from the proto file, if a
duplicate locale is found in the list, an exception is thrown from
LocaleList which causes the UsageStatsService to crash. Instead, we'll
now log a WTF if duplicate locales are found when parsing the
configuration proto and not add the duplicate locale to the list.

Bug: 140197723
Test: atest UsageStatsDatabaseTest
Change-Id: Ie178b3cfdd45e6771a7c0e4bb42e47f79b5c30cc
(cherry picked from commit 5d9031db)