RTL support on Category Parent Selection - Add Caegory Screen

While creating a new category, the User can select a parent category. The dialog box shown to the user for selecting the parent category doesn't support RTL configuration.

The above dialog is accessible through the flow

1. Posts List -> Post -> Post Settings -> Categories -> Add Category -> Click At Parent Category
2. Posts List -> Post -> Update -> Categories -> Add Category -> Click At Parent Category

Expected behavior

Please note that the above screenshot is a reference for the correct behaviour of parent-child indentation of categories in the RTL configuration. And not the exact UI.

Actual Behaviour

Screen on LTR	RTL layout

Steps to reproduce the behavior

• Enable RTL
• Go to any screen below
• 1. Posts List -> Post -> Post Settings -> Categories -> Add Category -> Click At Parent Category
• 2. Posts List -> Post -> Update -> Categories -> Add Category -> Click At Parent Category
• Note that the Parent-child categories doesn't have indentation
• Note that the Parent-child categories are on left side

Tested on [One plus Nord], Android [11], WPAndroid [18.5]

Enable RTL and reproduce the parent-category selection dialog through both listed Posts flows. Inspect the dialog reached from Add Category and compare its parent-child indentation and alignment with the expected RTL behavior; done when both flows display the hierarchy correctly in RTL.