[AOD] R4O6 Modify AOD brightness setting

Modify High/Sun value to systme brightness format on 50 nits

Bug: b/184728677
Test: Dump brightness while entry AOD mode
      panel-samsung-s6e3hc3 1c2c0000.drmdsim.0: req: 216, br: 216
      panel-samsung-s6e3hc3 1c2c0000.drmdsim.0: req: 198, br: 198
Change-Id: Ica79bc6fa0c8d15c6c123f9584d48bd71eaeb094
Merged-In: Ica79bc6fa0c8d15c6c123f9584d48bd71eaeb094
(cherry picked from commit 46e67d17ed4b9e79fde3554eaa3d19b5a685b58c)
2 files changed