* Looks like some variants don't have a CameraActivationSensor, so let's
remove the preference as the user's choice won't have an effect anyway
Change-Id: I7d157a992a6cb9ee333752772bc5e3b647b614f2
* Registering a non-existing sensor causes a RuntimeException which crashes
the Settings app which in turn takes down the whole system
* Change the RuntimeExceptions to normal error loggings
Change-Id: I18a73adc311bec6b70440a3266c7e2af74baa55a