Multi-tree API bp2build converter for ndk_library

This is a partial bp2build conversion that only emits the
cc_api_contribution target of ndk_library. We also need to convert this
to cc_stub_suite eventually to enable building vendor/product API
domains with Bazel

Also create an enum for the three known Multi-tree API surfaces (will
likely be expanded in the future)

Test: go test ./bp2build
Test: b cquery //bionic/libc:libc.ndk.contribution --output=starlark
--starlark:expr="providers(target)"

Change-Id: Idb24871ba20aae132b61eb31ef35c917cacae9e1

bp2build/ndk_library_conversion_test.go

@@ -0,0 +1,77 @@
+// Copyright 2022 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/cc"
+)
+
+func TestNdkLibraryContributionSymbolFile(t *testing.T) {
+	bp := `
+	ndk_library {
+		name: "libfoo",
+		symbol_file: "libfoo.map.txt",
+	}
+	`
+	expectedBazelTarget := MakeBazelTargetNoRestrictions(
+		"cc_api_contribution",
+		"libfoo.ndk.contribution",
+		AttrNameToString{
+			"api":                    `"libfoo.map.txt"`,
+			"api_surfaces":           `["publicapi"]`,
+			"library_name":           `"libfoo"`,
+			"target_compatible_with": `["//build/bazel/platforms/os:android"]`,
+		},
+	)
+	RunBp2BuildTestCase(t, cc.RegisterNdkModuleTypes, Bp2buildTestCase{
+		Blueprint:            bp,
+		ExpectedBazelTargets: []string{expectedBazelTarget},
+	})
+}
+
+func TestNdkLibraryContributionHeaders(t *testing.T) {
+	bp := `
+	ndk_library {
+		name: "libfoo",
+		symbol_file: "libfoo.map.txt",
+		export_header_libs: ["libfoo_headers"],
+	}
+	`
+	fs := map[string]string{
+		"header_directory/Android.bp": `
+		ndk_headers {
+			name: "libfoo_headers",
+		}
+		`,
+	}
+	expectedBazelTarget := MakeBazelTargetNoRestrictions(
+		"cc_api_contribution",
+		"libfoo.ndk.contribution",
+		AttrNameToString{
+			"api":                    `"libfoo.map.txt"`,
+			"api_surfaces":           `["publicapi"]`,
+			"library_name":           `"libfoo"`,
+			"hdrs":                   `["//header_directory:libfoo_headers.contribution"]`,
+			"target_compatible_with": `["//build/bazel/platforms/os:android"]`,
+		},
+	)
+	RunBp2BuildTestCase(t, cc.RegisterNdkModuleTypes, Bp2buildTestCase{
+		Blueprint:            bp,
+		Filesystem:           fs,
+		ExpectedBazelTargets: []string{expectedBazelTarget},
+	})
+}