This reverts commit 0779af6259.
Reason for revert: Breaks cts SignedConfigHostTest
Note: This CL effectively reverts commit:
54b8d7ea4d
"Make the USAP Pool refill delay configurable."
As that builds on top of the original CL being reverted. Only the
ZygoteServer portion of that change is reverted.
Test: atest SignedConfigHostTest
(on an acloud instance)
Bug: 132794985
Merged-In: I1327a22d103452bed46d191ec2bafb72a5e095ca
Change-Id: I1327a22d103452bed46d191ec2bafb72a5e095ca
3e68de1b19