ANDROID: virt: gunyah: Add addrspace_find_info_area hypercall

Newer versions of Gunyah provide a mechanism to discover early-boot
configuration information. This information was previously
non-discoverable and was provided via devicetree patching by Gunyah. The
info area is a page allocated by the hypervisor and mapped into the
guest.

Bug: 438364674
Change-Id: I3dd4781f163d72c3826fcb4c354e4deda865efab
Signed-off-by: Elliot Berman <elliot.berman@oss.qualcomm.com>
Signed-off-by: Hrishabh Rajput <quic_hrishabh@quicinc.com>