Move test zip file to assets

This is a no-op refactoring which move test data from resources
to assets, and repacking zip file to contain netstats sub-folder.

This is needed for later patches to put more test data points,
and having easier way to access them in batch.

Test: atest ConnectivityBenchmarkTests
Bug: 269409485
Change-Id: I1d09ac0187c9ce12982161243929d8e10483da45
3 files changed