Print module version in CtsNetTestCases conndiag

Bundle the version of the tethering APEX in the build branch into
CtsNetTestCases as a resource, and include it in the failure header on
test failure.

This should make it easy to identify what version of the module matches
the built test when investigating test failures.

Test: atest
Flag: TEST_ONLY
Change-Id: I15a53b3d7649ebde9706b10ee504d08aa78ee7de
4 files changed