Add a new platform_bootclasspath module type

Initially, this is just a placeholder but functionality will be added
in follow up changes.

Bug: 177892522
Test: m nothing
Change-Id: I890b0d5a117c51a19c9ac5df98c766761d3aa16c

java/platform_bootclasspath_test.go

@@ -0,0 +1,38 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package java
+
+import (
+	"testing"
+
+	"android/soong/android"
+	"android/soong/dexpreopt"
+)
+
+// Contains some simple tests for platform_bootclasspath.
+
+var prepareForTestWithPlatformBootclasspath = android.GroupFixturePreparers(
+	PrepareForTestWithJavaDefaultModules,
+	dexpreopt.PrepareForTestByEnablingDexpreopt,
+)
+
+func TestPlatformBootclasspath(t *testing.T) {
+	prepareForTestWithPlatformBootclasspath.
+		RunTestWithBp(t, `
+			platform_bootclasspath {
+				name: "platform-bootclasspath",
+			}
+		`)
+}