Revert "Solidify GC triggering and reporting"

This reverts commit 6d5a49c9b0f26a21316577683f282cf3bef492e3.

Reason for revert: Probably causes occasional severe jank. b/186592536.

Change-Id: I76d816b1e4c71569e195366088047d5a2a0aa8c1
4 files changed