ANDROID: KVM: arm64: Add EL2 wakeup cause hyp events

To bring some visibility to what is causing the hypervisor to wakeup,
bring 3 new hypervisor events:

  * host issued HVC64 (host_hcall)
  * host issued SMC (host_smc)
  * host mem abort (host_mem_abort)

Bug: 229972309
Change-Id: I920ff7efa59b12b63bea4637ddd91b7cba614854
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>