In preparation for adding more tests to LockSettingsService, convert the
existing JUnit3 tests to JUnit4 like the tests in the
recoverablekeystore subdirectory.
(cherry-picked from commit e7178a2358a457922ecb35c5f418903a3de363ab)
Test: atest FrameworksServicesTests:CachedSyntheticPasswordTests \
FrameworksServicesTests:LockSettingsServiceTests \
FrameworksServicesTests:LockSettingsShellCommandTest \
FrameworksServicesTests:LockSettingsStorageTests \
FrameworksServicesTests:LockscreenFrpTest \
FrameworksServicesTests:PasswordSlotManagerTests \
FrameworksServicesTests:SP800DeriveTests
Test: atest FrameworksServicesTests:SyntheticPasswordTests \
FrameworksServicesTests:WeaverBasedSyntheticPasswordTests
Bug: 145144304
Merged-In: Iaf280718d4c28966b60c76dda90a4674a24f26c6
Change-Id: Iaf280718d4c28966b60c76dda90a4674a24f26c6