Skip CtsIdentityTestCases:android.security.identity.cts.UserAuthTest for visible background users

Skip the tests until lockscreen supports multi-user on multi-display.
And add the secondary_user_on_secondary_display metadata.

Bug: 364940609
Flag: EXEMPT test fix
Test: atest CtsIdentityTestCases:android.security.identity.cts.UserAuthTest
Test: atest --user-type secondary_user CtsIdentityTestCases:android.security.identity.cts.UserAuthTest
Test: atest --user-type secondary_user_on_secondary_display CtsIdentityTestCases:android.security.identity.cts.UserAuthTest
(cherry picked from https://partner-android-review.googlesource.com/q/commit:76fb59eade66298a4f672562079577364a5fde7c)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:b847bad46d4e5eb65aa89a1d9faace6ef5372419)
Merged-In: If0360681e6d4b75fc40a5e25c2ad58239f9011dc
Change-Id: If0360681e6d4b75fc40a5e25c2ad58239f9011dc
3 files changed