Add the initial implementation of bp2build converter for java_library,

java_library_host, java_binary_host and cc_library_host_shared so
signapk tool can be built with Bazel.

Test: b build //build/bazel/examples/apex/minimal:build.bazel.examples.apex.minimal
Test: jarsigner -verify -verbose build.bazel.examples.apex.minimal.apex
Bug: 209876137
Bug: 196204358
Bug: 210158864
Bug: 210159074
Bug: 210158872
Change-Id: I855884159d25e69d8f9623792c376da820a1eb4c

bp2build/java_library_host_conversion_test.go

@@ -0,0 +1,57 @@
+// Copyright 2021 Google Inc. All rights reserved.
+//
+// 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 bp2build
+
+import (
+	"testing"
+
+	"android/soong/android"
+	"android/soong/java"
+)
+
+func runJavaLibraryHostTestCase(t *testing.T, tc bp2buildTestCase) {
+	t.Helper()
+	(&tc).moduleTypeUnderTest = "java_library_host"
+	(&tc).moduleTypeUnderTestFactory = java.LibraryHostFactory
+	runBp2BuildTestCase(t, func(ctx android.RegistrationContext) {}, tc)
+}
+
+func TestJavaLibraryHost(t *testing.T) {
+	runJavaLibraryHostTestCase(t, bp2buildTestCase{
+		description: "java_library_host with srcs, exclude_srcs and libs",
+		blueprint: `java_library_host {
+    name: "java-lib-host-1",
+    srcs: ["a.java", "b.java"],
+    exclude_srcs: ["b.java"],
+    libs: ["java-lib-host-2"],
+    bazel_module: { bp2build_available: true },
+}
+
+java_library_host {
+    name: "java-lib-host-2",
+    srcs: ["c.java"],
+    bazel_module: { bp2build_available: true },
+}`,
+		expectedBazelTargets: []string{
+			makeBazelTarget("java_library", "java-lib-host-1", attrNameToString{
+				"srcs": `["a.java"]`,
+				"deps": `[":java-lib-host-2"]`,
+			}),
+			makeBazelTarget("java_library", "java-lib-host-2", attrNameToString{
+				"srcs": `["c.java"]`,
+			}),
+		},
+	})
+}