Why are we updating current.xml? Platform packages can use @hidden internal...

Why are we updating current.xml? Platform packages can use @hidden internal classes. It seems because the build erroneously says to run make update-api, people are updating the API every time they add a new method or class. I am reverting current.xml to stock Android, because we should NOT be extending the public API that Android provides. Extending the public API and adding new internal classes are different things. Regardless, people are NOT using the CM SDK, so no is using these new "APIs" anyways. This will cause build breaks in the new Jenkins setup (hell, it was broken already, which is why I discovered this). We need to fix this.

Change-Id: Ie18bcb883cd16debbd00d31e9ea5597a3817c523