Revert^2 "ART: add GC time ratio metrics to GC performance"

Make GC time ratio metrics work for all collectors.

This reverts commit 4d57c69ab7753690738d9dc802b5b640cb6af491.

Test: Run art with -XX:DumpGCPerformanceOnShutdown on some benchmarks.
Bug: 112187497
Change-Id: I5cce0cf2a5204126b70b7c8fdf686986f9b3d7e7
6 files changed