Enable the picker db flag

This switches the PhotoPicker UI to fetch results from a pre-synced
picker db and returns picker URIs instead.

Test: atest MediaProviderTests
Test: atest CtsPhotoPickerTest
Test: Manual
Bug: 195009148
Change-Id: I8bb16c463d6aa4cfb9bd09024c44de5d117a2920
1 file changed