Instrument WorkManager and Jobs

[romtsn]

Description

We could instrument Android's WorkManager (and maybe other schedulers like AlarmManager or JobDispatcher) and power our Queues module.

Potential things we could capture:

• Job Status
• Job Start timestamp
• Job Duration
• Job Retries
• Job Constraints (network, etc)
• Job Frequency
• Call Stack

Android Studio's Jobs/Task inspector for inspiration:

[markushi]

Let's investigate first:

• If/how we can instrument the different work schedulers
• How the queues module works under the hood and if the data model would the mobile use case (there's one queue per user vs. one queue per server instance)

[kahest]

internal writeup on instrumentation options by @stefanosiano

[markushi]

Since sentry's concept of queues doesn't match WorkManager very well, we could have breadcrumbs and Events (e.g. for failed jobs) as well.