Remove repackaged.android.test.mock

The repackaged.android.test.mock uses internal APIs so cannot be built
against the SDK which means that anything that depends on it cannot
guarantee to run if those internal APIs change.

That library was built because the classes in
repackaged.android.test.runner depend on them. However, the
repackaged.android.test.runner library is only used by the
cts-api-signature-test target and it does not use any android.test.mock
classes directly, or indirectly. Therefore, this simply excludes any
classes from repackaged.android.test.runner that depend on
android.test.mock classes so that repackaged.android.test.mock can be
removed altogether.

Bug: 69899800
Bug: 30188076
Test: make checkbuild
Change-Id: If4528e6a4ec2b08faffd6d413672c5004d85e0a9