Issue 799 prevent incorrect background processing

[kmicha19-ford]

Fixes #1799 (when used in conjunction with PR #kmicha19-ford#1)

This PR is ready for review.

Risk

This PR makes no API changes.

Testing Plan

• I have verified that I have not introduced new warnings in this PR (or explain why below)
• I have tested this PR against Core and verified behavior

Unit Tests

No changes to any unit tests are required.

Core Tests

• Built the Obj-C example app and verified that all interactions work
  • iAP disconnect / reconnect
• Built the Swift example app and verified that all interactions work
  • iAP disconnect / reconnect

Summary

The iOS External Åccessory framework manages app background execution on connect and disconnect. The LifeCycle

Changelog

Breaking Changes

• [Breaking change info]

Enhancements

• [Enhancement info]

Bug Fixes

• [Bug Fix Info]

Tasks Remaining:

• [Task 1]
• [Task 2]

CLA

• I have signed the CLA

[kmicha19-ford]

Duplicate of #1911