* Revert "Revert "Add android license verification to doctor and some refactoring" (#14727)"
This reverts commit d260294752.
* Add tests, fix sdkManagerEnv and use it consistently, and rearrange Status object model
* AnsiSpinner needs to leave the cursor where it found it.
* fix tests
* Const constructor warning only shows up on windows...?
* Avoid crash if we can't find the home directory
* Make pathVarSeparator return a string in the mock
* Implement review comments
* Fix out-of-order problem on stop
Reports from that commit included:
* Doctor hanging
* Doctor prompting to install JDK
* AnsiStatus.cancel() printing elapsed time and extra newline
* Printing extra spinner character at the end of each line
* Initial version, seems to work
* Unit test for android license checker
* Cleanups
* Windows analyzer wants const.
* Refinements to timeout
* review comments
* Forgot a nit
* Flatten change out from lots of merges and temporary hacks for #7224
* Expand fakes to cover cases where doctor passes
* -v != --verbose
* Cosmetic touchups
* delint
* Clean up summary line, add a switch for review comments
* Review comments
* nit
* review comment
* review comments
* Get rid of static version methods which ignore the AppContext
* Review comments
* Review Comments
* Make branch behave the same as original implementation
* Fix tests
* executable.dart#main() depends on runner.dart#run()
* Refactor code such that non-commands don't depend on commands.
No code was actually changed in this PR - code was merely moved from
point A to point B.
