Standardize picker db cursor columns

1. Return the local or cloud provider authority in each cursor row
2. Re-use the column names as used in the view model, Item

Test: atest PickerDbFacadeTest
Bug: 195009139
Change-Id: I36a798e4cc9bc287ea97b42efa5b6a62e895c1f1
Merged-In: I36a798e4cc9bc287ea97b42efa5b6a62e895c1f1
(cherry picked from commit 951ba54a85599a5674b211d9668552cef1fa7547)
6 files changed