Create sysprop_library soong module

A newly introduced sysprop_library soong module will generate a
java_sdk_library and a cc_library from .sysprop description files.
Both Java modules and C++ modules can link against sysprop_library
module, thus giving consistency for using generated sysprop API.

As Java controls accessibility of Internal / System properties with
@hide and @SystemApi, 2 different header files will be created. And
build system will selectively expose depending on the property owner
and the place where the client libraries go into.

Bug: 80125326
Bug: 122170616
Test: 1) Create sysprop_library module.
Test: 2) Create empty txt files under prebuilts/sdk.
Test: 3) Create api directory, make update-api, and see changes.
Test: 4) Try to link against sysprop_library with various clients.
Test: 5) Soc_specific, Device_specific, Product_specific, recovery flags
work as intended.
Change-Id: I78dc5780ccfbb4b69e5c61dec26b94e92d43c333

cc/testing.go

@@ -0,0 +1,188 @@
+// Copyright (C) 2019 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 cc
+
+import (
+	"android/soong/android"
+)
+
+func GatherRequiredDepsForTest(os android.OsType) string {
+	ret := `
+		toolchain_library {
+			name: "libatomic",
+			vendor_available: true,
+			recovery_available: true,
+			src: "",
+		}
+
+		toolchain_library {
+			name: "libcompiler_rt-extras",
+			vendor_available: true,
+			recovery_available: true,
+			src: "",
+		}
+
+		toolchain_library {
+			name: "libclang_rt.builtins-arm-android",
+			vendor_available: true,
+			recovery_available: true,
+			src: "",
+		}
+
+		toolchain_library {
+			name: "libclang_rt.builtins-aarch64-android",
+			vendor_available: true,
+			recovery_available: true,
+			src: "",
+		}
+
+		toolchain_library {
+			name: "libclang_rt.builtins-i686-android",
+			vendor_available: true,
+			recovery_available: true,
+			src: "",
+		}
+
+		toolchain_library {
+			name: "libclang_rt.builtins-x86_64-android",
+			vendor_available: true,
+			recovery_available: true,
+			src: "",
+		}
+
+		toolchain_library {
+			name: "libgcc",
+			vendor_available: true,
+			recovery_available: true,
+			src: "",
+		}
+
+		cc_library {
+			name: "libbase",
+			no_libgcc: true,
+			nocrt: true,
+			vendor_available: true,
+			vndk: {
+				enabled: true,
+				support_system_process: true,
+			}
+		}
+		cc_library {
+			name: "libc",
+			no_libgcc: true,
+			nocrt: true,
+			system_shared_libs: [],
+			recovery_available: true,
+		}
+		llndk_library {
+			name: "libc",
+			symbol_file: "",
+		}
+		cc_library {
+			name: "libm",
+			no_libgcc: true,
+			nocrt: true,
+			system_shared_libs: [],
+			recovery_available: true,
+		}
+		llndk_library {
+			name: "libm",
+			symbol_file: "",
+		}
+		cc_library {
+			name: "libdl",
+			no_libgcc: true,
+			nocrt: true,
+			system_shared_libs: [],
+			recovery_available: true,
+		}
+		llndk_library {
+			name: "libdl",
+			symbol_file: "",
+		}
+		cc_library {
+			name: "libc++_static",
+			no_libgcc: true,
+			nocrt: true,
+			system_shared_libs: [],
+			stl: "none",
+			vendor_available: true,
+			recovery_available: true,
+		}
+		cc_library {
+			name: "libc++",
+			no_libgcc: true,
+			nocrt: true,
+			system_shared_libs: [],
+			stl: "none",
+			vendor_available: true,
+			recovery_available: true,
+			vndk: {
+				enabled: true,
+				support_system_process: true,
+			},
+		}
+		cc_library {
+			name: "libunwind_llvm",
+			no_libgcc: true,
+			nocrt: true,
+			system_shared_libs: [],
+			stl: "none",
+			vendor_available: true,
+			recovery_available: true,
+		}
+
+		cc_object {
+			name: "crtbegin_so",
+			recovery_available: true,
+			vendor_available: true,
+		}
+
+		cc_object {
+			name: "crtbegin_static",
+			recovery_available: true,
+			vendor_available: true,
+		}
+
+		cc_object {
+			name: "crtend_so",
+			recovery_available: true,
+			vendor_available: true,
+		}
+
+		cc_object {
+			name: "crtend_android",
+			recovery_available: true,
+			vendor_available: true,
+		}
+
+		cc_library {
+			name: "libprotobuf-cpp-lite",
+		}
+		`
+	if os == android.Fuchsia {
+		ret += `
+		cc_library {
+			name: "libbioniccompat",
+			stl: "none",
+		}
+		cc_library {
+			name: "libcompiler_rt",
+			stl: "none",
+		}
+		`
+	}
+	return ret
+}