[Squash]Revert all 5.0 changes for now, we build for 4.4.4

Revert "Handle 'sk' being NULL in UID-based routing."

This reverts commit 8c5b8d312ea42a5fb14413c433a59bcbc4df99d1.

Revert "enable idletimer"

This reverts commit bcc1f55bd42a81dab4ab84090fc5dcf259ae0154.

Revert "net: core: Support UID-based routing."

This reverts commit a41742b40b28893efe1b47028e0bd244a6f8926a.

Revert "Port 965593062 to xperia z"

This reverts commit 6bd1f4305222f88a79653d12f13f8598963dfc69.