Description

There are a number of a11y inconsistencies on Android API 21-22, due to API limitations on older versions.

Various controls don't appear to receive any accessibility focus:

• labels
• activity indicator, progress bar
• image

Most controls still don't read out semantic hint. (I've only noticed hint get read out from the slider control)

Steps to Reproduce

1. Run .NET MAUI sample on an Android device/emulator API 21
2. Navigate to Semantics Page
3. Turn on TalkBack (download the apk if needed)
4. Navigate through the page