Fix DisplayState sanitization.

Bug: 347307756
Flag: EXEMPT bugfix
Test: CredentialsTest
(cherry picked from commit b6ddf525be3c2abbde59ae1533494b18a7961087)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:4e8200dec484fd6e5873f2a89c0b314467034eef)
Merged-In: I500ff9a5bd356845e2d0be4d1430448f448c4e8a
Change-Id: I500ff9a5bd356845e2d0be4d1430448f448c4e8a
9 files changed