CloudSearch API: changes two key names and adds two keys for app pkg name and install count in ExtraInfo

CTS-Coverage-Bug: 210528288
Bug: 223198536
Test: RBE Built redfin-eng and tested on a physical device
Change-Id: Ib7066bcb37618c4e5d751cd0eb0bc1d265831427
Merged-In: Ib7066bcb37618c4e5d751cd0eb0bc1d265831427
2 files changed