Fix clear shell command for start and exit info

Currently both of these clears all records even if you supply a package name rather than just the ones of that package.

Test: (both start and exit) access records, clear records related to one package, confirm other records remain
Test: (both start and exit) clear all records, confirm all are gone
Test: (both start and exit) add invalid param to clear command, confirm it fails with error message
Bug: 337087320
Flag: EXEMPT - day-to-day bugfix
Change-Id: I3d0edc1ff000fbc4ff7082a538dbe43c21ee9256