Set diagnostics log-data-type to CONNDIAG

This will mark connectivity diagnostics files collected on failure as
CONNDIAG type, so they can be easily identified in test results. Having
a separate type will also allow automatically filtering them so they can
be pulled across test results and flake stats can be aggregated (for
example to identify which wifi access points are typically flaky).

The CONNDIAG type was added in change ID:
Ib56decb7660e9f93844337fa7a5bf9b00610c1c6

See that change for details of the option on FilePullerLogCollector.

Test: atest
Change-Id: I00fe23acf308723583e8ec82a032b42475a68173
1 file changed