Prepare for usage of ReflectionFreeAssertThrows from more packages:
Make AbstractPackageSanityTests ignore the class for simplicity. (But also add null checks (which solve only part of the problem) to ReflectionFreeAssertThrows because why not.)
Remove support for util.concurrent types so that we can also remove util.concurrent deps (mostly added during cl/675634517 and cl/686155720). I'll include support for those types in the packages that actually need it.
Prepare for usage of
ReflectionFreeAssertThrowsfrom more packages:AbstractPackageSanityTestsignore the class for simplicity. (But also add null checks (which solve only part of the problem) toReflectionFreeAssertThrowsbecause why not.)util.concurrenttypes so that we can also removeutil.concurrentdeps (mostly added during cl/675634517 and cl/686155720). I'll include support for those types in the packages that actually need it.RELNOTES=n/a