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",
diff --git a/rust/rust.go b/rust/rust.go
index 19c5230..15144ac 100644
--- a/rust/rust.go
+++ b/rust/rust.go
@@ -20,6 +20,7 @@
 
 	"android/soong/bazel"
 	"android/soong/bloaty"
+	"android/soong/testing"
 	"android/soong/ui/metrics/bp2build_metrics_proto"
 
 	"github.com/google/blueprint"
@@ -144,8 +145,9 @@
 
 	Properties BaseProperties
 
-	hod      android.HostOrDeviceSupported
-	multilib android.Multilib
+	hod        android.HostOrDeviceSupported
+	multilib   android.Multilib
+	testModule bool
 
 	makeLinkType string
 
@@ -1038,6 +1040,9 @@
 
 		ctx.Phony("rust", ctx.RustModule().OutputFile().Path())
 	}
+	if mod.testModule {
+		ctx.SetProvider(testing.TestModuleProviderKey, testing.TestModuleProviderData{})
+	}
 }
 
 func (mod *Module) deps(ctx DepsContext) Deps {
diff --git a/rust/test.go b/rust/test.go
index 4b5296e..7ffc367 100644
--- a/rust/test.go
+++ b/rust/test.go
@@ -222,11 +222,13 @@
 	// rustTestHostMultilib load hook to set MultilibFirst for the
 	// host target.
 	android.AddLoadHook(module, rustTestHostMultilib)
+	module.testModule = true
 	return module.Init()
 }
 
 func RustTestHostFactory() android.Module {
 	module, _ := NewRustTest(android.HostSupported)
+	module.testModule = true
 	return module.Init()
 }