Windows phone emulator requires Hyper-V to run, but Android emulator in turn requires Intel Hardware Acceleration Manager (HAXM), which is intolerant to Hyper-V.
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This is probably the best work around:
http://blogs.msdn.com/b/virtual_pc_guy/archive/2008/04/14/creating-a-no-hypervisor-boot-entry.aspx
You keep two BCD entries referring to same Windows 10 partition, but one with Hyper-V activated (hypervisorlaunchtype Auto), and another one with Hyper-V suppressed (hypervisorlaunchtype Off). Still you have to reboot the system, but no need to install/uninstall Hyper-V, which is a significant relief.
A proposito, this article uses bcdedit which is a standard Windows command line utility. As an alternative, you can use a GUI application Visual BCD editor