Revert "Add spin loop to mutex, overhaul monitor"

This reverts commit 0d508a01106746e0d8865752850f4f03bcce1e01.

Reason for revert: Preparing revert, in case the art/ci/host-x86_64-cdex-fast failure recurs.

Bug: 140590186

Change-Id: I404b6ee498ff4eda73ec3b8fc4bf8e92efb2705f
10 files changed