It's only implementing the activity lifecycle events, but at least they're fed
end-to-end in the pipeline (from app to service implementation).
Test: mmm -j packages/experimental/FillService && \
adb install -r ${OUT}/data/app/FillService/FillService.apk && \
adb shell settings put secure intel_service foo.bar.fill/.AiaiService
Bug: 111276913
Change-Id: I2f46be1e6a6a21ad909e5fffea01bedaa28fb300
7a53408d19