This effects the following Titanium APIs:
The material progress indicators are colored and sized differently compared to the older widgets.
Activity Indicator Test:
This can be tested with the attached ActivityIndicatorTest.js, which will display what's shown below.
Progress Bar Test:
This can be tested with the attached ProgressBarTest.js, which will display what's shown below.
The app must use a "Theme.MaterialComponents" based theme or else an exception will occur. So, app's using a custom theme based from "Theme.AppCompat" or similar will crash. This is normal and the exception will state that the theme will need to change.