Set IntentResolverUnitTests' targetSdk to "current"

It was previously fixed at "30" which was hiding a lot of API
lint. While fixing and reviewing that code I also found and
corrected anumber of timeout checks with no assertions
or no timeout duration (causing false positives or hangs).

Bug: 297527444
Bug: 297549732
Test: atest IntentResolverUnitTests
Change-Id: I65eda95ea3dc84b7b4b5c497b195474f094e048d
5 files changed