Move NsdServiceInfoTest to common tests

- NsdServiceInfoTest can be the unit and cts test because
  NsdServiceInfo is a Parcelable class. Thus, move
  NsdServiceInfoTest class to common tests directory.
- Also add ConnectivityModuleTest annotation because the tests
  are using some connectivity APIs which need to run with the
  latest module.
- Fix some coding style errors.
- Remove unnecessary ThreadPolicy code which may affect other
  tests.

Bug: 266839012
Test: atest FrameworksNetTests CtsNetTestCases
Change-Id: Idc4251ef7a1efa294c8a692eb09129440691a22e