Refactor VTI tests to support null encryption

-Split input and output into separate tests
-Refactor to inject null encrypted packets while still allowing
 encrypted packets to be mirrored
-Add a check to ensure plaintext packets are not sent.

Bug: 123202162
Test: VtsKernelNetTest can pass
Change-Id: I7f7dc6ba7d16aca44b73ac0ee456f7ad59e38bca
Merged-In: I6cad55f65d32fae9ea17fb44ea796bdcd4aba3a3
1 file changed
tree: 7ff9d0355482aab50ca16c9dddd764fd3dd656e3
  1. devicetree/
  2. net/
  3. Android.bp