Hi Paul,
Please refer to our AIR 24 beta release notes and go through the section "Permissions on Android and iOS"
http://fpdownload.macromedia.com/pub/labs/flashruntimes/shared/air24_flashplayer24_releasenotes.pdf
You can use such keys directly under <infoAdditions> tag in app.xml file while packaging AIR application.
Kindly refer to below example for NSLocationAlwaysUsageDescription:
<InfoAdditions><![CDATA[
<key>NSLocationAlwaysUsageDescription</key>
<string>Sample description to allow geolocation always</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string>Sample description to allow geolocation when application is in foreground</string>
<key>UIDeviceFamily</key>
<array>
<string>1</string>
<string>2</string>
</array>
]]></InfoAdditions>
Please let us know if it helps you.
Thanks,
Adobe AIR Team