Verify kernel implementation of ChaCha20Poly1305

This CL adds the test infra for testing kernel implementation of IPsec
algorithms and a test for ChaCha20Poly1305

Since there is no hardware that first launched with SDK beyond R at the
time of writing this CL, the test for ChaChaPoly was manually
enabled and verified on the pixel with an updated kernel

Bug: 171083832
Test: atest IpSecAlgorithmImplTest
Original-Change: https://android-review.googlesource.com/1503694
Merged-In: Ia29540c7fd6848a89bfa2d25c6a87921e45d98da
Change-Id: Ia29540c7fd6848a89bfa2d25c6a87921e45d98da
3 files changed