fb: TRDS change auto detect light conditions method

Currently on critical light conditions it still switches to often between
on and off which results in bad UX and in worse cases to unusable phone
due that it is permanently switching. To prevend that slacken the light mode
level detection and set it when it goes to dark mode way more higher (LIGHT_CONDITION)
and when into light mode back to lower level (DARK_CONDITION)

PS
- 25 looks good

Change-Id: I665f3141fe31f26ca371d10593ff95174d68fc9e
Frameworks: TRDS fix possible UI freeze on auto mode change

- only call on theme mode change when auto mode changes. Under special conditions
  it can happen that it is called twice
- ensure that whenever a mode change is really done to close the notification shade
- minor cleanup

Change-Id: If1ffd4c1d2c1d8b17b6e7867a42bad1776e82c0c

Conflicts:
	core/java/com/android/internal/util/slim/SlimActions.java