Revert "memevents: Create new API to verify listener state"

This reverts commit 4e99824a65a8068eaef87a75e07a8b3ec78b0a8a.

Reason for revert: Intermediate CLs of b/330433910

Change-Id: Ib39ba19d4333575cdb14518ef84b18d32a91d6da
3 files changed