libchromeos: Add D-Bus de-serialization for array of dictionaries

This is basic enough type to occur regularly. I bumped into the need
for this while testing GCD command support for jet since they use
arrays of objects in their command parameters.

BUG=brillo:107
TEST=`FEATURES=test emerge-link buffet`

Change-Id: I8e518d727be2454c102f575d58f0aae244087835
Reviewed-on: https://chromium-review.googlesource.com/262295
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Reviewed-by: Vitaly Buka <vitalybuka@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
1 file changed