Add package parsing v1 vs v2 benchmark

Creates benchmarks for package parsing v1 vs v2, with variants
for cached vs non-cached and sequential vs parallelized.

The code used is copied from PackageCacher and the old PackageParser
implementation, since they are not accessible to the test class.

Bug: 141922546

Test: atest PackageParsingPerfTest

Change-Id: I1777f84cb54d1ad5ae0dfd32a3461c1b07eef8e0