[2/2] OmniGears: fix ActiveDisplay for WifiOnly Devices

fix http://jira.omnirom.org/browse/OMNI-637
also fix for devices with unsupported Proximity sensor and Light sensor

Change-Id: I19a8c2cf1afbf7c631d27481ed84e700ba56368f
Merge "[2/2] OmniGears: fix ActiveDisplay for WifiOnly Devices" into android-4.4
Merge pull request #3 from omnirom/android-4.4

[2/2] OmniGears: fix ActiveDisplay for WifiOnly Devices