Add module dependency checking testing method

Currently in Soong testing suite, the only method for testing module
dependency is CheckModuleDependencies(...), which comapares for the
exact module dependencies. This change adds the method
CheckModuleDependency(...) which enables checking the dependency between
two modules, instead of comparing for all dependencies of an interested
module.

Test: m nothing
Bug: 288624417
Change-Id: I804d35979ddc24b0134671e326c1d37615ec4190

java/testing.go

@@ -574,7 +574,7 @@ func gatherRequiredDepsForTest() string {
 	return bp
 }
 
-func CheckModuleDependencies(t *testing.T, ctx *android.TestContext, name, variant string, expected []string) {
+func getModuleDependencies(t *testing.T, ctx *android.TestContext, name, variant string) []string {
 	t.Helper()
 	module := ctx.ModuleForTests(name, variant).Module()
 	deps := []string{}
@@ -583,11 +583,29 @@ func CheckModuleDependencies(t *testing.T, ctx *android.TestContext, name, varia
 	})
 	sort.Strings(deps)
 
+	return deps
+}
+
+// CheckModuleDependencies checks if the expected dependencies of the module are
+// identical to the actual dependencies.
+func CheckModuleDependencies(t *testing.T, ctx *android.TestContext, name, variant string, expected []string) {
+	deps := getModuleDependencies(t, ctx, name, variant)
+
 	if actual := deps; !reflect.DeepEqual(expected, actual) {
 		t.Errorf("expected %#q, found %#q", expected, actual)
 	}
 }
 
+// CheckModuleHasDependency returns true if the module depends on the expected dependency.
+func CheckModuleHasDependency(t *testing.T, ctx *android.TestContext, name, variant string, expected string) bool {
+	for _, dep := range getModuleDependencies(t, ctx, name, variant) {
+		if dep == expected {
+			return true
+		}
+	}
+	return false
+}
+
 // CheckPlatformBootclasspathModules returns the apex:module pair for the modules depended upon by
 // the platform-bootclasspath module.
 func CheckPlatformBootclasspathModules(t *testing.T, result *android.TestResult, name string, expected []string) {