Fix AppStartInfo crash on null in progress record

From bug linked, the in progress record can be null and cause a crash. The only path for a null in progress record I can find is when records load is in progress, so handle that case explicitly. Additionally, handle null potential in all accesses, even though this should not be possible anymore.

Test: presubmit as I don't have a specific repro
Bug: 328353697
Change-Id: If79a185d6a17d4c505dd1849e089ac26d3c88209