gh-124666: Improve thread cleanup in test_android

[mhsmith]

The hanging buildbot in #124666 was caused by a leftover thread created in the test's setUp method. It was supposed to be cleaned up by tearDown, but that isn't called automatically when setUp fails.

I still don't know why the underlying test failure was happening, but I've increased all the timeouts to LOOPBACK_TIMEOUT (10 seconds) in case that makes a difference.

Also cleaned up a couple of other test failure logging issues.

• FixesIntermittent buildbot failure and timeout on Android aarch64 #124666

[mhsmith]

!buildbot android

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @mhsmith for commit 4997d1b 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F131427%2Fmerge

The command will test the builders whose names match following regular expression: android

The builders matched are:

• AMD64 Android PR
• aarch64 Android PR

[freakboy3742]

Seems like a reasonable set of fixes to me. If nothing else, I guess this means the failure case will actually fail, rather than timing out, which is a definite improvement; maybe the new failure will reveal more detail about why it's failing? (We can but hope :-) )

[miss-islington-app]

Thanks @mhsmith for the PR, and @freakboy3742 for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13.
🐍🍒⛏🤖

[bedevere-app]

GH-131433 is a backport of this pull request to the 3.13 branch.