This reverts commit 8d6900e011.
Reason for revert: The UIDs in this CL are Linux UIDs, which are never
negative. The @UserIdInt annotation is incorrect and the bypass()
override is unnecessary. See the comments on ag/15339446 for another
instance of this issue.
Change-Id: I79ccbb40c3f0ab1a3bb48f55da5a72696d4fb2b1