Add Custom Metrics

[serglom21]

Description

Add custom metrics to the Android demo app. These replicate the same metrics that were added to our react service here

• products_request.duration
• checkout.click
• checkout.error
• checkout.success

[sdzhong]

Hey @serglom21 , can you please share sample events or their metrics for this PR?

[serglom21]

Ah yeah, totally!

• transaction.duration (default)
• checkout.error(custom)

I do see something not working as expected with the products_request.duration metric, where the description for that span is not showing up - I will check on that with the team and follow up!

[serglom21]

Mhmm things are not fully working as expected here. Not necessarily because of the code introduced on this PR but rather because of this issue that happens with our demo data.

I would want to wait until that issue gets addressed by our engineers before merging this. I will follow up in the next couple of days

[sdzhong]

Hey @serglom21

I do see something not working as expected with the products_request.duration metric, where the description for that span is not showing up - I will check on that with the team and follow up!

This should be fixed in https://github.com/getsentry/sentry-java/releases/tag/7.8.0, (4.5.0 of the gradle plugin)