Prefer rlibs for diced

Static linking generates smaller binary, which is crucial for microdroid
and presumably better for Android.

Bug: 214231981
Test: m
Change-Id: I3b5a0f48ac10e93c9b79838762ff85b4df4a1de7
diff --git a/diced/Android.bp b/diced/Android.bp
index db0268c..525828e 100644
--- a/diced/Android.bp
+++ b/diced/Android.bp
@@ -124,6 +124,7 @@
 rust_binary {
     name: "diced",
     srcs: ["src/diced_main.rs"],
+    prefer_rlib: true,
     rustlibs: [
         "android.hardware.security.dice-V1-rust",
         "libandroid_logger",