Add iOS device accessibility settings to device properties.

[selanthiraiyan]

Related to - https://github.com/woocommerce/woocommerce-ios/pull/7576

Changes

In order to understand the accessibility settings of our users, this PR adds the following properties to the deviceProperties dictionary of analytics events.

• preferred content size category to know the font size settings.
• is accessibility category boolean to know whether the font size falls under accessibility category.

Known issue

As this PR adds two properties to the Transformable deviceInfo (a dictionary) property of the core data model, we will face errors when trying to load stores created using previous versions of the core data model.

This is handled here by deleting the old store and creating a new one using the latest core data model.

I hope that we have to use a ValueTransformer to deal with the Transformable deviceInfo property of the core data model. I am not sure whether this issue was ignored because,

• A change to the Transformable dictionary (deviceInfo, customProperties, and userProperties) type properties is not supposed to happen often.
• Optimistically, the events are expected to have been already uploaded by the time the user updates the app, and the store gets deleted. 🤞

Please correct me if I am wrong about this.

Testing instructions

Follow the testing instructions from https://github.com/woocommerce/woocommerce-ios/pull/7576

[selanthiraiyan]

If I understand the two properties correctly, do they correspond to the two controls in the settings below?

Oh, it looks like that. I didn't realise this before. 😄

I added the device_info_is_accessibility_category property with the help of UIContentSizeCategoryIsAccessibilityCategory method as it looked like an easy way to filter events.