Fix socket timeout test failures.

The kernel uses awkward device-specific units that make tests with timeouts
that aren't integer multiples of a second awkward.

There's no common superclass for the various sockets, so we can't factor
out the test even though -- apart from the creation of the specific socket --
it's textually identical in each case. Nice library design, boys!

I've also fixed a couple of CloseGuard warnings in passing.

Bug: 5159133
Change-Id: Iaf4c9891b3cf2f5b3ebcee5cb2ba862157ab034e
3 files changed