Revert^2 "Improve stack unwinding during gcstress tests."

This reverts commit 47d2947967e301b7a1f9d3d01ad8953cea8a52c7.

Reason for revert: Reland after timeout issues disappeared.

Bug: 142039427
Change-Id: Id563c79b4a9e58b5bcfeafc35ef807b173af54e3
4 files changed