Put maxTargetSdk=P APIs onto light greylist.

Since the per-SDK level enforcement support is not ready in ART yet, we
can't implement the correct enforcement for maxTargetSdk=P. Putting these
APIs on the dark greylist causes problems for existing apps, so put them
on the light greylist instead.

Test: m
Bug: 117899984
Change-Id: Ib3dad2f50eb6a769ba9f21cec4bac01275888ef6