Don't allow secondary users apps to start restricted Settings fragment.

On a secondary user, the fragments ApnSettings, TetherSettings and VpnSettings
should not be started.

But an app can still send an intent to start these fragments.
Prevent this by checkin the userId in these fragments.

BUG:15313261
BUG:15312781
BUG:15312494

Change-Id: I2a36bb89a8e37e4440aa28372d7a1800b33dae37