Stop Wake Lock thread if it is running

If the Wake Lock thread is running, stop it whenever initialize() is
called in order to prevent an invalid Wake Lock Queue from being read.

Also disable all sensors whenever initialize() is called to ensure
that stale sensor registrations are properly cleaned up.

Bug: 122468928
Test: Sensors HAL 2.0 tests run without crashing
Change-Id: I5fb55628545adbb481da6fcda157c78cff834134