Update vpnprofilestore_test to legacykeystore_test in TEST_MAPPING am: 3c8cbe0379 am: 29c38f48b5

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/thread_local/+/1755950

Change-Id: Icc9c47296f536c03db56db0f4a76aa950ec28672