Share srcs in rust_defaults am: 3f5054f5e1 am: 3b0bad17d8 am: f76eee2ed5

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/rand_core/+/1366137

Change-Id: I3d4ed6ce1d1de30fbca68bb6ed48dad205c1fcce
diff --git a/Android.bp b/Android.bp
index 318aa5b..bf36d3a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -19,6 +19,7 @@
 rust_defaults {
     name: "rand_core_defaults",
     crate_name: "rand_core",
+    srcs: ["src/lib.rs"],
     test_suites: ["general-tests"],
     auto_gen_config: true,
     edition: "2018",
@@ -35,13 +36,11 @@
 rust_test_host {
     name: "rand_core_host_test_src_lib",
     defaults: ["rand_core_defaults"],
-    srcs: ["src/lib.rs"],
 }
 
 rust_test {
     name: "rand_core_device_test_src_lib",
     defaults: ["rand_core_defaults"],
-    srcs: ["src/lib.rs"],
 }
 
 // dependent_library ["feature_list"]