Remove mContext from IpSecBaseTest

This commit removes the mContext from IpSecBaseTest, and replaces it
with InstrumentationRegistry.getContext().

Bug: 72950854
Test: Ran on devices, passing.
Merged-In: If6fa359825aa9d1f7d4c8d49aba7a34925c073ed
Change-Id: If6fa359825aa9d1f7d4c8d49aba7a34925c073ed
(cherry picked from commit 69760fb5b62ae0e36c2a88bb20502dead3d7589b)
2 files changed
tree: 82ac084a51cba2384b5015f9777da782db181973
  1. tests/