Ambient: If user turned off ambient, keep it off after split

The split ambient settings default to on - which is a bad experience
if the user explicitly turned it off before the split.

Change-Id: Id80d62727952f63b363f87c19b5befbde8ab5c31
Merged-In: I986d35a1a28e97f4c8d7d3d47ed5658e1836a44f
Merged-In: I346a53b0dc9cdf578c238113f4f33056ba0f3aea
Fixes: 32332195
Test: Flash angler to NYC, disable ambient, upgrade to NYC-MR1, check if "Lift to check phone" is still off.