ART Services: Implement cancellation.

Bug: 244412198
Test: atest ArtServiceTests
Test: manual -
  1. adb shell pm art optimize-package -m speed -f \
        com.google.android.youtube
  2. adb shell pm art cancel <job-id>
Ignore-AOSP-First: ART Services.
Change-Id: I3ae3e5e65d1f2bfc7961d2df541e98a3c2e8a2d6
10 files changed