Update vpnprofilestore_test to legacykeystore_test in TEST_MAPPING am: 433ff92f39 am: 8686d150a1 am: fdbed56a11 am: 82349aaf44

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

Change-Id: I204b2cb91869559798a8bf3b38a6b40efa4dfcea