Add logging for AutomaticBrightness

Adding more readable table for relationship between
lux, nits and display brightness.

  Difference between current config and default:
             lux:  0.00,   1.0,   2.0,   3.0...
         default:   5.1,  10.0,    18,    22...
       long-term:   5.1,  10.0,    18,    22...
         current:   2.3,   3.0,   5.0,   5.8...
     current(bl): 0.000, 0.001, 0.004, 0.005...
      current(%):     0,    14,    24,    32...

Test: adb shell dumpsys display
Bug: 220586744
Change-Id: Idb3df2ae446de1df760907a9f2f7601c41663988