Add placeholder test to prevent CI failure. am: e160951daa

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/1818942

Change-Id: Id56d1c6edfe98e851eeb00b82468f41a09ac86cd
diff --git a/idsig/Android.bp b/idsig/Android.bp
index c5fc161..3f70a64 100644
--- a/idsig/Android.bp
+++ b/idsig/Android.bp
@@ -15,11 +15,6 @@
         "libnum_traits",
     ],
     proc_macros: ["libnum_derive"],
-    multilib: {
-        lib32: {
-            enabled: false,
-        },
-    },
 }
 
 rust_library {
diff --git a/virtualizationservice/src/main.rs b/virtualizationservice/src/main.rs
index 018be7b..8628c01 100644
--- a/virtualizationservice/src/main.rs
+++ b/virtualizationservice/src/main.rs
@@ -65,3 +65,12 @@
     }
     Ok(())
 }
+
+#[cfg(test)]
+mod tests {
+    /// We need to have at least one test to avoid errors running the test suite, so this is a
+    /// placeholder until we have real tests.
+    #[test]
+    #[ignore]
+    fn placeholder() {}
+}