Framework for the anomaly detection.

This cl adds the following components for anomaly dection:
1. AnomalyLoader: run all the anomaly checks in the background
2. Anomaly: Data class to represent what anomaly it is
3. Detector: Different kinds of anomaly detector with common interface
4. Action:  Suggestions when facing anomaly(Force stop, uninstall)
5. AnomalyDialogFragment: show the confirm dialog for action
6. AnomalyPreferenceController: handle update and click for
anomalyPreference, since it will be used in multiple fragments.
7. AnomalyUtils: utility class for anomaly

This cl also adds skeleton for the wakelock check and action. Following
cls will add real implementation about it.

Bug: 36924669
Test: RunSettingsRoboTests
Change-Id: I89fc4b6963757869b93791b4275ca53c04ab9604