Fix screen on count text dump

dischargeScreenOffCount already includes dischargeScreenDozeCount.
Original code deducted dischargeScreenDozeCount twice. This only affects
text dump in bugreport. Proto and checkin dump are not affected.
Test: manual
Fixes: 78187276

Change-Id: Id93465ca75a4a1078e8f280a38b74b696ec62dd2
1 file changed