load rialto in kernel mode

This makes rialto compatible with Gunyah, which currently
requires the payload to be loaded at the start of RAM.

Bug: 359659124
Bug: 355696053
Bug: 353758405
Test: atest rialto_test
Change-Id: Id83f4535600553f5715fe440cd411b66c229e8c2
diff --git a/guest/rialto/tests/test.rs b/guest/rialto/tests/test.rs
index cf5630f..9adf78c 100644
--- a/guest/rialto/tests/test.rs
+++ b/guest/rialto/tests/test.rs
@@ -318,7 +318,7 @@
     rand_bytes(&mut instance_id).unwrap();
     let config = VirtualMachineConfig::RawConfig(VirtualMachineRawConfig {
         name: String::from("Non protected rialto"),
-        bootloader: Some(ParcelFileDescriptor::new(rialto)),
+        kernel: Some(ParcelFileDescriptor::new(rialto)),
         protectedVm: false,
         memoryMib: 300,
         platformVersion: "~1.0".to_string(),