Overview chips are constructed in AiAi and inserted into a Launcher
container (similar to what's done for the SuggestView). This CL
(and its sibling) remove the dependency on the NavBarHint plugin
for chip hint data, and instead obtain the information from AiAi.
BUG: 124390101
Change-Id: I07beb79dba2edaafb231b03e70b647ae211b5c1b
Miranda Kephart
cd5beb3e62