Replace Constants.installationId with a generated device id

[yousif-bugsnag]

Goal

Replaces the usage of Constants.installationId (which has been removed in SDK 51) with our own generated device id.

Design

The device id is now generated using @bugsnag/cuid and is stored/retrieved synchronously on start using expo-secure-store.

This means there is now an additional peer dependency on expo-secure-store that must be installed alongside @bugsnag/expo

Changeset

• added @bugsnag/cuid dependency and expo-secure-store peer dependency to plugin-expo-device
• replaced Constants.installationId with our own generated device id
• updated bugsnag-expo-cli to automatically install the expo-secure-store peer dependency
• added UPGRADING.md

Testing

• added new unit tests
• reinstated skipped device.id tests and added new test to assert that the device id is persisted across app starts