Remove dependencies on the 1-variant fallback

When adding a dependencies, if the variants don't match, but the
dependency only has 1 variant anyways, soong will always use that
variant. This makes it hard to add new variants to soong, because the
1-variant fallback stops being used and you start getting missing
variant errors. Make changes to bp files such that all dependencies
correctly specify the variant to use.

Bug: 372091092
Flag: EXEMPT refactor
Test: m nothing
Change-Id: Ief9e1962fb08349fa1c73d3f86db22a29d62ddf5
diff --git a/build/microdroid/Android.bp b/build/microdroid/Android.bp
index cacf356..abb97da 100644
--- a/build/microdroid/Android.bp
+++ b/build/microdroid/Android.bp
@@ -597,6 +597,7 @@
 // HACK: use cc_genrule for arch-specific properties
 cc_genrule {
     name: "microdroid_kernel_hashes_rs",
+    compile_multilib: "first",
     srcs: [":microdroid_kernel"],
     arch: {
         arm64: {
@@ -621,6 +622,7 @@
 
 rust_library_rlib {
     name: "libmicrodroid_kernel_hashes",
+    compile_multilib: "first",
     srcs: [":microdroid_kernel_hashes_rs"],
     crate_name: "microdroid_kernel_hashes",
     prefer_rlib: true,
diff --git a/libs/libservice_vm_fake_chain/Android.bp b/libs/libservice_vm_fake_chain/Android.bp
index 39f36eb..56fb22a 100644
--- a/libs/libservice_vm_fake_chain/Android.bp
+++ b/libs/libservice_vm_fake_chain/Android.bp
@@ -18,6 +18,7 @@
 
 rust_defaults {
     name: "libservice_vm_fake_chain_defaults",
+    compile_multilib: "first",
     crate_name: "service_vm_fake_chain",
     defaults: ["avf_build_flags_rust"],
     srcs: ["src/lib.rs"],
diff --git a/libs/libservice_vm_requests/Android.bp b/libs/libservice_vm_requests/Android.bp
index 57da012..d87b087 100644
--- a/libs/libservice_vm_requests/Android.bp
+++ b/libs/libservice_vm_requests/Android.bp
@@ -4,6 +4,7 @@
 
 rust_defaults {
     name: "libservice_vm_requests_nostd_defaults",
+    compile_multilib: "first",
     crate_name: "service_vm_requests",
     defaults: ["avf_build_flags_rust"],
     srcs: ["src/lib.rs"],