What is Android accessibility

Android accessibility testing:
As everyone does not interact in the same way with smart devices as we do, so accessibility brings a fairness for the people with different disabilities, such as visual impairment, cognitive disability, or any other disability, it should be insure that each and everyone is able to access the content of this digital world as everyone else does.
Android accessibility testing can help in identifying the problems related to accessibility and resolve it to make the experience of the users seamless through their apps.
The aspects to test:
Proper labelling: the images and buttons should be labelled correctly. This makes it easier for the people to navigate through the application with screen readers
Colour contrast: a proper colour contrast makes it easier for reading the text and using the application in extreme conditions, like in daylight during outdoors. It should be made sure that the app has a good colour contrast in both dark mode, & light mode.
Touch targets: the interactive elements of an application should have an enough size which is reachable for the users. People with mobility disabilities can face difficulty if the button size is smaller. People with low vision, even normal people who have large fingers, if there walking, aur travelling, can face difficulty if the touch targets are smaller.
Using accessibility services: by using accessibility services, such as talk back, switch access, it can be experienced whether an application is accessible for the people who use the services or not. It must be checked that all actions in the application are easily accessible through the services.