Refactor sensor list in SensorService

Refactor sensor lists management logic in sensorservice:
  * Factor all sensor list management code into a separate class.
  * Remove error-prone repeated sensor lists.
  * Solve synchronization issue when sensor is added or removed during runtime.
  * Switch to STL containers.

Bug: b/27911774

Change-Id: I94d5571e1fa3166dbe893ffac2a2a7584be6349c