Introduce vintf_fragment module type

Introduce a new vintf_fragment module type which handles vintf_fragment
files within Soong. This will help process to move vintf_fragment
handling logic from KATI to Soong. This change also introduces
vintf_fragment_modules property to mark dependency with vintf_fragment
modules.

Bug: 322089980
Test: m nothing --no-skip-soong-tests passed
Change-Id: I49607f42aeee3ded0ba7b078b903dc35f5d61637

android/testing.go

@@ -126,6 +126,10 @@ var PrepareForTestWithMakevars = FixtureRegisterWithContext(func(ctx Registratio
 	ctx.RegisterSingletonType("makevars", makeVarsSingletonFunc)
 })
 
+var PrepareForTestVintfFragmentModules = FixtureRegisterWithContext(func(ctx RegistrationContext) {
+	registerVintfFragmentComponents(ctx)
+})
+
 // Test fixture preparer that will register most java build components.
 //
 // Singletons and mutators should only be added here if they are needed for a majority of java
@@ -149,6 +153,7 @@ var PrepareForTestWithAndroidBuildComponents = GroupFixturePreparers(
 	PrepareForTestWithPackageModule,
 	PrepareForTestWithPrebuilts,
 	PrepareForTestWithVisibility,
+	PrepareForTestVintfFragmentModules,
 )
 
 // Prepares an integration test with all build components from the android package.