Enable size measurement for Rust binaries

Bug: 172339742
Test: m out/soong/binary_sizes.pb
Change-Id: Ibc9feaa1c806b888d8850303ab7eeaf5e5337e35
diff --git a/rust/Android.bp b/rust/Android.bp
index 8b2aa30..a29c474 100644
--- a/rust/Android.bp
+++ b/rust/Android.bp
@@ -8,6 +8,7 @@
     deps: [
         "soong",
         "soong-android",
+        "soong-bloaty",
         "soong-cc",
         "soong-rust-config",
     ],