Fix fs-verity API for secondary users

createFsveritySetupAuthToken previously takes a userId in order to
handle the app uid, ended up did it incorrectly. Since the
authentication in question is really to compare the calling uid with
the file owner's uid, userId doesn't really matter. Drop it and fix the
range check accordingly.

Ignore-AOSP-First: cross-repo API change
Bug: 319280249
Test: atest FsVerityTest
Test: atest FsVerityTest --user-type secondary_user
Test: atest installd_service_test
Change-Id: I4090792afaf05c3dff5cb34731ef7030243196c2
Merged-In: I4090792afaf05c3dff5cb34731ef7030243196c2