There were few reports in the bug for this to not always be set. Based on the stack trace it is related to Keyguard showing/hiding, but I was unable to repro locally the issue. Adding a safety check to prevent this from occuring with proto log if it happens. Bug: 233129957 Test: n/a, unable to repro, fix based on the stack trace Change-Id: Ie45e557601fe52da6003790446b18aad2db681e5