Also make the new lib only use system-apis.
This allows mainline module to use the new
RestrictedLockUtilsSettingLib.
Unfortunately the whole RestrictedLockUtils would have caused to much
new system-api. Hence it was split into RestrictedLockUtils and
RestrictedLockUtilsInternal. This caused a lot of trivial code changes.
Bug: 110953302
Test: Built
Change-Id: I693b3bf56f3be71f0790776e3aad5694717786ef
4e615e6986