fix(open-native-settings): allow supported input

[briznad]

This pull request fixes issue #2665

The open-native-settings plugin doesn't allow input which is supported by the underlying Cordova-open-native-settings plugin (https://github.com/guyromb/Cordova-open-native-settings).

As the underlying plugin author explains:

In Android, by default [Settings] is opened in the same application as a new activity… In order to open settings as a new application (two applications will appear in "recent/opened" apps list) the following code can be used: window.cordova.plugins.settings.open(["wifi", true]); ....

However, in index.ts the only accepted input is a string, making the advanced option unobtainable.

This fixes that.