Prevent NPE when displaying a missing clock

Test: Manual
Bug: 229771520
Fixes: 237255645
Change-Id: I17cddba7aee082c118f9f63eaab8a8c025daee73
(cherry picked from commit 2a4d9e5d51257cd43a10758e931990f582629b50)
Merged-In: I17cddba7aee082c118f9f63eaab8a8c025daee73
1 file changed