CP GuestUserInteractorTest.kt that got left out of CP somehow.

Bug: 369137871 
Flag: TEST_ONLY
Test: presubmits

Change-Id: Ia67cd0dde70d58bbc1c28642cb2b1f45a9a8415d
Merged-In: I002033537eb0a5a591dd2b30546a0446c8b99225
1 file changed