Revert "Telephony light grey list clean up for Q"

This reverts commit 253bdb71.

Reason for revert: This CL caused MMS break because Bugle is using the
hidden API in Q's darkgrey list. The proper fix should either come from
Bugle team if their apk moved to Q, or compat team to explore why this
caused issue for app target on P.

Change-Id: Icc6c190cde79c10d9045183c0b80cdf008e95578

Bug: 117899984