* 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
