Fix edge case with target content offset

[bryankeller]

Details

This is a follow-up to #116 - I realized that we don't want to do target content offset logic whenever the bounds changes (it changes when the content offset changes). We only want to handle target content offset if the size changes.

Related Issue

N/A

Motivation and Context

Fixing edge cases

How Has This Been Tested

Example app, Airbnb app

Types of changes

• Docs change / refactoring / dependency upgrade
• 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)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[brynbodayle]

Ah, good catch