Update vpnprofilestore_test to legacykeystore_test in TEST_MAPPING am: 97c556068a am: 1a89bbdf08 am: 6682ab449a

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/getrandom/+/1756254

Change-Id: Ia43d398ca12e792fa5766daecba03624612ad20b