Certain network types, like the VCN, have underlying
networks for the purpose of data usage, but do not want to
propagate the underlying network capabilities.
Allow these networks to set underlying networks, but continue
not to propagate the capabilities.
Bug: 190620024
Test: new unit test
Original-Change: https://android-review.googlesource.com/1753619
Merged-In: I53d6080f48707ff3c37fbfbef534284ba77a7432
Change-Id: I53d6080f48707ff3c37fbfbef534284ba77a7432
Move the tests together with packages/Connectivity code, so both can be
moved to packages/modules/Connectivity together.
Also reorganize unit tests in a unit/ directory, as other tests
(integration/, common/ etc.) have been added in tests/net since they
were created. This makes the directory structure consistent.
Test: atest FrameworksNetTests
Bug: 187814163
Ignore-AOSP-First: needs per-branch move for merge conflicts
Change-Id: I254ffd1c08ec058d594b4ea55cbae5505f8497cc
