Fix inconsistent getPackageInfo() calls when parsing exceptions.

This change makes the two checks check against the same PackageInfo to
be more consistent. Previously the former check was checking the one
returned by getPackageInfo() and the latter check was checking the one
returned by getSystemPackageInfo().

Bug: 117246830
Test: manual
Change-Id: I01a677f10634c45e5a9a967b0f5287a66f3e7482