Add a widgets recommendation mechanism based on AiAI app predication
ranking with the following changes:
1. Only one widget is picked from one app.
2. Widgets that are already added to the workspace are excluded from
the recommendation.
Test: run PredicationUpdateTaskTest
Bug: 179797520
Change-Id: Ia697bc6df0bae75969e68b7b3de32d57901f7461
Removing a separate table for workspace screens. List of screens are
automatically parsed using the items in the favorites DB. Order of the
screen based on the screen id and rearranging screens is no longer
supported. In case the screens need to be rearranged, all the items
in the favorites db will need to be updated with new screen ids.
This makes backing up the DB (in the same database) easier as only
one table needs to be duplicates.
Change-Id: I8ba947a898f637d780e2f49925e78604263126e8
Sunny Goyal
Steven Ng