fix: fix storage timing issue, set sessionId before plugin.setup

[justin-fiedler]

Summary

• Fix storage timing issue from last commit
  • After the last change sometimes deviceId would not be loaded in time for the session events. This fix resolves that issue by moving the storage creation back into the proper coroutine.
• Set sessionId before plugin.setup()
  • this is once again part of buildInternal so that the storage is fully setup
  • We load the initial session id prior to the internal calls to add(plugin)
  • Note - If plugins require accurate values for sessionId in setup they must be either
    1. added via config e.g. amplitude(Configuration(plugins = listOf(pluginThatNeedsSessionIdInSetup)
    2. Added after amplitude.isBuilt.await()
• Improved sessionId check in Plugin.setup to verify that a valid session id is set (not -1)

Checklist

• [x] Does your PR title have the correct title format?
• Does your PR have a breaking change?: No

[github-actions[bot]]

:tada: This PR is included in version 1.16.6 :tada:

The release is available on:

• GitHub release
• v1.16.6

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