Add misc logging:

- Button clicks in app detail page:
  uninstall/disable/clear data/clear cache
- More logging in search:
  log inline search result click, and its metadata such as
  name/value/rank.

Fix: 32652772
Fix: 32798201
Test: make RunSettingsRoboTests
Change-Id: I90cef7c9ea9ea69ea9cf083013a38417097f8594