We need to watch the lifecycle so that we can unregister callbacks and
not cause leaks.
This change also rewrites the SensorPrivacyManagerHelper. The previous
implmementation was using deprecated apis. It also had an issue where
if a callback was added it would not necessarily register alistener with
the callback with the service since that was only done when the value is
checked. Now we register a listener when the class is instantiated and
with the new API there will only be the 1.
Finally we impove the tests to have more coverage and test both
SensorToggleControllers and the SensorPRivacyManagerHelper class.
Test: Use profiler to verify no more leaks
SensorToggleControllerTest, SensorPrivacyManagerHelperTest
Bug: 244280065
Change-Id: Ibf0bcee455444a104ca6800302907c3dc0de8f1f
5ba4065703