Move filesystem into Config

The filesystem object was available through ModuleContext.Fs(), but
gives too much access to the filesystem without enforicing correct
dependencies.  In order to support sandboxing the soong_build
process move the filesystem into the Config.  The next change will
make it private.

Bug: 146437378
Test: all Soong tests
Change-Id: I5d3ae9108f120fd335b21efd612aefa078378813

rust/rust_test.go

@@ -51,6 +51,19 @@ func TestMain(m *testing.M) {
 	os.Exit(run())
 }
 
+func testConfig(bp string) android.Config {
+	bp = bp + GatherRequiredDepsForTest()
+
+	fs := map[string][]byte{
+		"foo.rs":     nil,
+		"src/bar.rs": nil,
+		"liby.so":    nil,
+		"libz.so":    nil,
+	}
+
+	return android.TestArchConfig(buildDir, nil, bp, fs)
+}
+
 func testRust(t *testing.T, bp string) *android.TestContext {
 	// TODO (b/140435149)
 	if runtime.GOOS != "linux" {
@@ -58,11 +71,11 @@ func testRust(t *testing.T, bp string) *android.TestContext {
 	}
 
 	t.Helper()
-	config := android.TestArchConfig(buildDir, nil)
+	config := testConfig(bp)
 
 	t.Helper()
-	ctx := CreateTestContext(bp)
-	ctx.Register()
+	ctx := CreateTestContext()
+	ctx.Register(config)
 
 	_, errs := ctx.ParseFileList(".", []string{"Android.bp"})
 	android.FailIfErrored(t, errs)
@@ -79,10 +92,10 @@ func testRustError(t *testing.T, pattern string, bp string) {
 	}
 
 	t.Helper()
-	config := android.TestArchConfig(buildDir, nil)
+	config := testConfig(bp)
 
-	ctx := CreateTestContext(bp)
-	ctx.Register()
+	ctx := CreateTestContext()
+	ctx.Register(config)
 
 	_, errs := ctx.ParseFileList(".", []string{"Android.bp"})
 	if len(errs) > 0 {