Related to https://github.com/fleetdm/fleet/issues/48114
Related to https://github.com/fleetdm/fleet/issues/47386
Changes:
- Added a new exit to seven Android proxy endpoints `managementApiError`
that is used when the Android management API responds with a transient
5xx error (502, 503, and 504).
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## Summary by CodeRabbit
* **Bug Fixes**
* Improved handling of temporary Android Management API failures by
returning a dedicated, retry-friendly error outcome for transient 5xx
responses (502/503/504).
* Updated enrollment, web app creation, device deletion/modification,
command issuance, policy changes, and enterprise app policy updates to
surface clearer, more specific failure messages instead of generic
errors.
* Makes it easier to identify issues that may resolve on retry.
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