Add test spec provider to test modules.

Provider added for the following test modules in this change: art_cc_test, cc_benchmark, cc_fuzz, cc_test, cc_test_host, rust_test,and rust_test_host.

Bug: 296873595
Test: Manual test
Change-Id: I815680529bcbecacb3a2bdb8f3746053afdee48c
diff --git a/rust/Android.bp b/rust/Android.bp
index b01a94a..c5b2000 100644
--- a/rust/Android.bp
+++ b/rust/Android.bp
@@ -12,6 +12,7 @@
         "soong-cc",
         "soong-rust-config",
         "soong-snapshot",
+        "soong-testing",
     ],
     srcs: [
         "afdo.go",