To my knowledge, an x86 Android emulation using Intel's Hardware Accelerated Execution Manager and Windows 8 Hyperv cannot be run concurrently at the time of this writing.
The best answer would allow them to run concurrently (probably not currently possible).
The most common workaround is to uninstall the Hyperv feature completely. If you actually need to use Hyperv this is painful. A better work around can be found here. http://blogs.msdn.com/b/virtual_pc_guy/archive/2008/04/14/creating-a-no-hypervisor-boot-entry.aspx . This forces you to reboot, but at least you're not having to constantly uninstall/reinstall Hyperv.
I'm looking for a solution which doesn't require anything to be uninstalled and doesn't require a reboot.