Convert IPsec tests to JUnit4

This patch fixes an incompatibility where some tests in the same
hierarchy were using Junit3, and other Junit4

No functional test changes made

Bug: 72950854
Test: Ran on devices, working
Change-Id: I79d231e202ba25ad5f57b44b387bebd7f012aa95
Merged-In: I79d231e202ba25ad5f57b44b387bebd7f012aa95
(cherry picked from commit 0d08e91fe7c2112f44bc12c4d0d00b386e9bebd7)
3 files changed
tree: a6a0a6fff090aa0234867a7ea0e46b1c708337f9
  1. tests/