I use menu icons provided in the android sdk, like the the info icon below. All the platforms prior to version 14 provided these in ldpi, mdpi, and hdpi. Platforms 14 and 15 provide xhdpi icons, but they no longer include the menu icons (because they have been replaced with actionbar friendly icons).
So, is there somewhere that the old menu icons are published in xhdpi sizes?
Edit:
The below link is helpful. The provided clipart includes some of the icons I need, which can then be exported to xhdpi. But I still am missing a couple the “ic_menu_compose.png” icon.
I think you will find the answer to this is no.
The reasoning for this is that tablet computers are the real targets of xhdpi (due to their screen size) and they are a newish addition to Android hardware on the whole. Tablet’s started on Android 3.0 (API 11) and new ones will (hopefully) come out with ICS which uses a higher API level. As you said yourself the actionbar uses smaller icons so that eliminates a few more possibilities.
My answer: use Paint.NET or Photoshop and enlarge said icon or make another.