profcollectd: Avoid hard-coding Betterbug name

Use vendor config file to provide the uploader package name and action
name, so that OEMs can implement their own uploaders.

Test: manual
Bug: 178561556
Bug: 183487233
Change-Id: Ib398f34825233db1b9a9f2e4da78c7ce35953164
Merged-In: Ib398f34825233db1b9a9f2e4da78c7ce35953164
(cherry picked from commit 2d17c284)