OmniGears: Fix detecting if OmniSwitch is available

Remove OmniSwitch settings if app is either uninstalled
or disabled (frozen)

Change-Id: Ia43d8518aa8d5bafdf5c6c64086a23c1a0f12cba
OmniGears: Fix detecting if OmniSwitch is available
Merge branch 'omnirom-android-4.4' into android-4.4