include predicted_rank in app launch logging

Test:
1. . build/envsetup.sh && tapas NexusLauncher
2. ccdebug && cclogcat
3. launch from workspace any app that is also in predicted apps
4. verify in terminal it has correct predicted_rank

Bug: 143855018
Change-Id: I07a62f07057537a6c09384cf944bbc5aa5888d22
Merged-In: I07a62f07057537a6c09384cf944bbc5aa5888d22