[2/2] OmniSwitch: fix OmniSwitch recents integration for multi-user

listen to user changes and broadcast the user id
with service start/stop

Change-Id: I598441c1040bcc133d2b8eaa37398154f84795f4
Merge pull request #3 from omnirom/android-4.4

[2/2] OmniSwitch: fix OmniSwitch recents integration for multi-user