Migration to Westworld (2/2)

Add new metrics for Q
1. log app package name that launches docsui picker
2. log search type(chip, search history, search string)
3. log search mode(chip, keyword, both)
4. log PickResult including failed case

Bug: 111552654
Test: atest DocumentsUITests
Change-Id: Ibb93ec2b1a5c0b8d60c8e3b51e47cd21acd871c1