libweave: Add DictionaryFromDBusVariantDictionary

Added unittests for DictionaryFromDBusVariantDictionary and test with
reverse conversion.

BUG=brillo:1245
TEST='FEATURES=test emerge-gizmo buffet'

Change-Id: I061f753d158f53398aa7ef0ec2757e50ed6cec7a
Reviewed-on: https://chromium-review.googlesource.com/287946
Reviewed-by: Vitaly Buka <vitalybuka@chromium.org>
Commit-Queue: Vitaly Buka <vitalybuka@chromium.org>
Tested-by: Vitaly Buka <vitalybuka@chromium.org>
3 files changed
tree: 94dcb4d9756615d1baeedf63c44cf3b2d84c7f6d
  1. buffet/
  2. libweave/