Fix: Block opening settings app on keyguard without user auth

Test: atest KeyGestureEventTests
Bug: 378900798
Flag: EXEMPT bugfix
(cherry picked from commit d615298466085c4a88c6733804160e0c1ee7e31e)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:e4d483a2ef99a71c6fcd6ad2e6c2f8f88ba380f4)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:e832d2b23784ede62259fb7518573e12dced2209)
Merged-In: I89d43872108710d20e0c4ef7e652d389896155d7
Change-Id: I89d43872108710d20e0c4ef7e652d389896155d7