Revert "Revert "Open up AndroidPackage as @SystemApi""

This reverts commit 750ce30b8467d1e7c26568c0f2fb2c05b02bbb09.

Reason for revert: b/199246839 fixed, re-introduce change

Change-Id: I48f3fd20ac14c823c85de55f667d1860dade1f97
63 files changed