stats: Add PrintJob event

We want to log stats about print jobs, like were they successful,
failed, cancelled and what were the job attributes.

Log print jobs when they are in final print spooler states.

Bug: 390478410
Test: atest PrintSpoolerRobolectricTests
Test: m PrintSpooler
Test: validate logged events via adb and webui
Flag: com.android.printspooler.flags.printing_telemetry
Change-Id: I7705e0cb7bf4d9c80584c6887ae99d3c32fa2ebc