nf: IDLETIMER: Adds the uid field in the msg

Message notifications contains an additional uid field. This field
represents the uid that was responsible for waking the radio. And hence
it is present only in notifications stating that the radio is now
active.

Change-Id: I18fc73eada512e370d7ab24fc9f890845037b729
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
Bug: 20264396