systemFeatures property
Describes what features are available on the current device.
This can be used to check if the device has, for example, a front-facing camera, or a touchscreen. However, in many cases this is not the best API to use. For example, if you are interested in bluetooth, this API can tell you if the device has a bluetooth radio, but it cannot tell you if bluetooth is currently enabled, or if you have been granted the necessary permissions to use it. Please only use this if there is no other way to determine if a feature is supported.
This data comes from Android's PackageManager.getSystemAvailableFeatures, and many of the common feature strings to look for are available in PackageManager's public documentation: https://developer.android.com/reference/android/content/pm/PackageManager
Implementation
final List<String> systemFeatures;