Merge "[libnblog] Use new jsoncpp API" am: 96de95d911 am: 3a55dfac87 am: 15cccdff47

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1606999

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ie18877fe0bbca45c76f2b606974bf49a7221ed27