Reland "Create a pool of 20 measurement files per library for coverage."

This reverts commit 0c4fb3dd4bade98d8da17129ec7c278be4f4e28f.

Reason for revert: Permissions issue in b/173448692 are fixed.

Change-Id: Ic0382484c8e46470b4d7986681229fef0f0dcdfc
1 file changed