error 402: Current Android sdk version doesn't support uses-permission-sdk-23 as xml tag

We want to include this in the android manifest:

<uses-permission-sdk-23 android:name=“android.permission.READ_EXTERNAL_STORAGE”/>

This would allow us to ask for the permission only in the new Android permissions model, but without requiring it for Android versions < 6.0, since the new permission would prevent some people from installing the update.

But when I try to package for android, I get this error:

[java] /Users/me/path/to/project/bin-release-temp/Main-app.xml: error 402: Current Android sdk version doesn't support uses-permission-sdk-23 as xml tag

This is with AIR SDK 28 and the latest stable Android SDK, version 7.0. Am I missing something, or is there a way around this?