Gets a provider instance by executing the following steps when called for the first time:

• if the system property "java.nio.channels.spi.SelectorProvider" is set, the value of this property is the class name of the provider returned;
• if there is a provider-configuration file named "java.nio.channels.spi.SelectorProvider" in META-INF/services of a jar file valid in the system class loader, the first class name is the provider's class name;
• otherwise, a system default provider will be returned.

[Android Documentation]