Fix NPE during dumpsys

Test: atest CtsIncidentHostTestCases:com.android.server.cts.IncidentdTest
Test: atest CtsIncidentHostTestCases:com.android.server.cts.PackageIncidentTest#testPackageServiceDump
Bug: 126253679
Change-Id: Ie42fe9cad14fd8cd9b889b16b7de6d63aed1ddab
1 file changed