Call jobFinished after ProfcollectBGJobService processing completes

Summary:Add a call to `jobFinished` after processing completes to ensure that the system is notified
that the work has been completed.

Test: Run `adb shell cmd jobscheduler run -f android 260817` multiple times in succession. Verify that processing is now triggered each time.

Tags:
Change-Id: Ifa6fcd8b2fdcea4904677bcae4a1cb36cac33154
Signed-off-by: Abhishek Gadewar <abhishekgadewar@meta.com>