Update vpnprofilestore_test to legacykeystore_test in TEST_MAPPING am: 433ff92f39 am: 8686d150a1

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/hashbrown/+/1756576

Change-Id: I321fb716b145ebe460887bd64677ba3f410eb86b