Make first version of expression evaluation work in  google3 (#1175)

* Make first version of expression evaluation work in  google3

- Add API to start expression compiler service with given
  platform paths

- Make logging emit logger name and message level by default

- Fix a bug where full dill path was incorrectly created due to
  replacing .js by .full.dill instead of changing extension

- Do not crash on null isolate (null isolate happens during
  application rebuild)

- Pass exceptions from expression compiler worker to the
  expression compilation service instead of failing silently

- Add a test for evaluating a private field in the current
  library

- Remove skip from fixed tests

* format

* Updated changelog and version

* Format

* Update expression_compiler_service.dart
12 files changed