Prevent NPE in QSLogger

This prevents an NPE that was crashing CTS tests.

Test: atest CtsAppTestCases:TileServiceTest
Test: atest BooleanTileTest
Fixes: 149475098
Fixes: 149476175
Change-Id: I806bfd881772f2e229d595aaf68f5e3782c51f6b
1 file changed