Fix testing with/without connectivity module

Add missing @ConnectivityModuleTest annotations to tests that cover
functionalities that were introduced in a newer connectivity module
update.

Also add CtsNetTestCasesLatestSdk to postsubmit with only APK modules
installed, and with only the connectivity/tethering module installed.
This can then be moved to presubmit to catch such issues before they are
merged.

While doing this cleanup the TEST_MAPPING file in tests/ and merge its
contents into the root TEST_MAPPING file. This does not change anything
for "postsubmit" tests as they are run independently of changes. It only
causes FrameworksNetIntegrationTests to run in presubmit on any change
in modules/Connectivity/ instead of only on modules/Connectivity/tests/
changes, which is how it should be.

Bug: 218611855
Test: TH needs to test TEST_MAPPING
Change-Id: I26629a35d8c2df3db33180ecc22d49d538ad3b8b
7 files changed