[j16sdiz]

First, `sharedUserId` is opt-in.

You need something like that for plugin / extension like system.

Third, it is being deprecated. and people are screaming "bad google" "android is no longer free!"

[chrisjj]

> First, `sharedUserId` is opt-in.

By the user?

> You need something like that for plugin / extension like system.

Plugin/extension != app.