Rename vts-core to vts

Bug: 151896491
Test: local build
Exempt-From-Owner-Approval: This CL moves all tests in vts-core to vts.
It won't change test logic or behavior.

Change-Id: I4b0b56b8c7f1963c644e784083d0be722dda9961
Merged-In: I4b0b56b8c7f1963c644e784083d0be722dda9961
1 file changed