Use DockManager instead of BatteryController for Falsing.

Also, pause the proximity sensor directly when we dock/undock.
This ensures that we don't wait for some other event to occur
before changing the state of the proximity sensor.

Fixes: 192670703
Test: atest SystemUITests
Change-Id: If2b429639df76bbd4cf8adecc987dcf18ae45925
8 files changed