Re-add auto brightness configuration UI (1/2)

- Add a button into the new brightness dialog that allows opening the
  auto brightness setup
- Enable auto-brightness adjustment (setting for general brighter/darker
  adjustment) and twilight adjustment

Change-Id: I7fd11ddaa112396dcb7508692aacb93bfe3da256
Profile: respect DPM when overriding screen lock (1/2)

Profile currently allows the user to override the keyguard set by
device policy, which is undesired.

Change-Id: Id8d80cfdad51ca0a64dc231a77e53b104ecb9825