Add visibility rule for migration.

Add paths to visibility needed for tests.
Soong allows specifying paths w/o validation.  Once the
migration is complete, we can remove the old path in
visibility rules.

BUG: 137323948
Test: TH
Merged-In: I2bf7e83bb6f4fd67f7826bf8087674a82c6577c9
Change-Id: I9a25986803126adc175e9da9638586b463dda774