fix: bug where context state was overwritten at install

[bflorian]

Fixed a bug where the INSTALLED lifecycle event was overwriting any state items stored in the installed app context during the initial page flow.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [x] I have read the CONTRIBUTING document
• [x] My code follows the code style of this project (hint: install an xo editor plugin)
• [ ] Any required documentation has been added
• [x] I have added tests to cover my changes

[smartthingspi]

:tada: This PR is included in version 4.3.1 :tada:

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

Your semantic-release bot :package::rocket: