39b4c5b2da
The current behaviour with regards to changing the owner UID is bizarre and arguably incorrect. A NetworkAgent can change the owner to whatever other app it wants, regardless of signatures, at any time. This includes, for example, transferring ownership to another UID and then recovering it. Fortunately no existing NetworkAgent appears to do this: - ClientModeImpl sets it to the UID of the app that created the configuration. It doesn't look like it can change while the network is connected. - Vpn sets it to the UID of the VPN owner. That also can't change. - Telephony does not appear to set it at all, it only sets the administrator UIDs (and updates them whenever it gets EVENT_CARRIER_PRIVILEGED_UIDS_CHANGED). Disallow this now before code is written that depends on it. Bug: 175188445 Test: modified tests in ConnectivityServiceTest Change-Id: I638e29fda2481ec3bf4fff562ea66a73322881df