Fix regression of wrong min value on night display slice

The min value of NightDisplayIntensityPreferenceController
should always be 0 (which is the old value we used before
ag/7062353). The range is cacluated from the relative value
to MinimumColorTemperature, which means the min value should
always be 0.

Test: atest NightDisplayIntensityPreferenceControllerTest
Fixes:130758028
Change-Id: Ica75672dda6a9ee0c6013f1c903611263b7d133f

src/com/android/settings/display/NightDisplayIntensityPreferenceController.java

@@ -82,7 +82,8 @@ public class NightDisplayIntensityPreferenceController extends SliderPreferenceC
 
     @Override
     public int getMin() {
-        return ColorDisplayManager.getMinimumColorTemperature(mContext);
+        // The min should always be 0 in this case.
+        return 0;
     }
 
     /**