Migrate system/core/adb to packages/modules/adb

Adding new path to visibility rule, as b/170958306 prevents adding
new changes to a project being introduced in the same topic.  We need to
do this ahead of the migration and then cleanup after the migration is
complete.

BUG: 167963357
Test: TH
Change-Id: Id02e4ea3a6d387bad7b2dbd5d0a38f662d0254fc