feat: Migrating from IntentService to WorkManager

[TheRealAgentK]

feat: Migrating from IntentService to WorkManager

Description 📝

This change stems from #82 and serves two purposes:

1. Migrate away from IntentService to WorkManager due to deprecation and better performance/functionality in WM
2. Improve the Crash Reporting behaviour when the virtual machine of the app crashes due to low-level errors such as a StackOverflowError.

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Updates

👉 Migrated Crash Reporting and RUM JobIntentServices and the surrounding classes to WorkManager API
👉 Rewired flows from CrashReporting and RUM classes accordingly

Test plan 🧪

• General functionality works
• Build works
• CR and RUM posts go through to back end as pre-change
• StackOverflowError and VM crash gets logged to RG (tested and ✔️ )

Author to check 👓

• Project and all contained modules build
• Tested on appropriate devices/emulators and SDK versions
• Reviewed by another developer
• Appropriate documentation written (code comments, internal docs)

Reviewer to check ✔️

• Change has been tested on a device/emulator
• Code is written to standards
• Appropriate tests have been written (code comments, internal docs)

[TheRealAgentK]

Had to merge develop in to resolve conflicts.

[miquelbeltran]

zsh didn't like having a branch with # as the first char 😂

➜  raygun4android git:(develop) git checkout #82-SOE
Your branch is up to date with 'origin/develop'.
➜  raygun4android git:(develop) git checkout \#82-SOE
branch '#82-SOE' set up to track 'origin/#82-SOE'.
Switched to a new branch '#82-SOE'

[miquelbeltran]

I tested a bit on an emulator and seems fine.

Given the changes in the Manifest, we should mark this change as breaking and next release should be a major version bump.

I left some comments, but nothing is a blocker.

[TheRealAgentK]

zsh didn't like having a branch with # as the first char 😂

➜  raygun4android git:(develop) git checkout #82-SOE
Your branch is up to date with 'origin/develop'.
➜  raygun4android git:(develop) git checkout \#82-SOE
branch '#82-SOE' set up to track 'origin/#82-SOE'.
Switched to a new branch '#82-SOE'

Oh, interesting. I usually name them feature/#<id>-something - missed that in this one for some reason.