add the test config lib to a target that is used in platform build

There are tests that uses aconfig flag libs that are not used by actual
platform build. So querying these flags will fail in new storage as they
are not present in storage files. Short term fix is to add them to
platform build depdenency.

Change-Id: I8b485ad65e2fa91258165c3a15c5d509b30d4018