This tests against the failure that was fixed in #7189

This fixes an infinite loop in the code that walks the parent
context chain looking for a variable.

This also includes a fix in build_info.dart whereby if the context
is set but the config is not yet set, we were trying to dereference
null.

* refactor the --resident run option into a separate file

* update daemon to run --resident apps

* re-plumbing daemon start

* send app logs

* update tests

* review changes

* fix test runner

* remove PackageMap.createGlobalInstance; rely on the ctor

* review comments

* handle an exit code from android n

* review comments

* fix analysis errors

* review comments; fix test

* re-add an export for debugPrint

rename to printTrace(), printStatus(), and printError()