Allow some slop on socket time values

Depending on the kernel HZ compile-time setting, sometimes
timeouts cannot be set exactly.

This change allows for "tcpUserTimeout" values to be inaccurate
by up to 10ms.

Manual backport for CTS from commit
b53e50ac due to file location
change.

Bug: 115848572
Test: Ran test on HEAD version
Merged-In: Ib626037522f8ab6d64542f6a4c7aac6dabba33f0
Change-Id: I74062ebc81096c4257420e7691ac54dd63b90e9b