[BOT.10] Add unit test for data limit and rule change in BpfCoordinator

The applying data limit is based on the forwarding rule changes.
Add the tests for verifying their interactions with netd.

Bug: 150736748
Test: BpfCoordinatorTest
Change-Id: I5a98c4cd74e2de6005ee05defa761f6af3fd4e75
1 file changed