First off, you are reading it wrong. But it doesn't matter.
Google owns the copyright on Android, so the Apache License has no relevance to their activities. Licenses are a way of limiting the restrictions levied by copyright law; they give you more freedom than you would otherwise have. If you otherwise have more freedom than a license grants because you are not bound by copyright law, you ignore the license. It's meaningless.
I haven't contributed any code to the Apache-licensed parts of Android, but I assume that you assign copyright to Google when you push your code. That means that Google continues to own the copyright on the whole codebase, and you have copyright on your contributions.
Google owns the copyright on Android, so the Apache License has no relevance to their activities. Licenses are a way of limiting the restrictions levied by copyright law; they give you more freedom than you would otherwise have. If you otherwise have more freedom than a license grants because you are not bound by copyright law, you ignore the license. It's meaningless.
I haven't contributed any code to the Apache-licensed parts of Android, but I assume that you assign copyright to Google when you push your code. That means that Google continues to own the copyright on the whole codebase, and you have copyright on your contributions.