Add HidlMemoryCache and mapMemory(memory_block)

The HidlMemoryCache is a singleton class which provides cache for
sp<IMemory>. It works as an abstraction layer on top of the
IMapper. It supports, but is not limited to, the Ashmem type
HidlMemory.

Bug: 69640640
Test: hidl_test/internal master/sailfish
Change-Id: I69cca18dbdda532eaae409ee9372b3080f7d58dd
diff --git a/libhidlcache/Android.bp b/libhidlcache/Android.bp
new file mode 100644
index 0000000..7fd5aa7
--- /dev/null
+++ b/libhidlcache/Android.bp
@@ -0,0 +1,47 @@
+// Copyright (C) 2016 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.
+
+cc_library {
+    name: "libhidlcache",
+    vendor_available: true,
+    vndk: {
+        enabled: true,
+    },
+    defaults: ["libhidl-defaults"],
+    shared_libs: [
+        "libbase",
+        "liblog",
+        "libutils",
+        "libcutils",
+        "libhidlbase",
+        "libhidlmemory",
+        "libhwbinder",
+        "libhidltransport",
+        "android.hidl.memory@1.0",
+        "android.hidl.memory.block@1.0",
+        "android.hidl.memory.token@1.0",
+    ],
+    export_include_dirs: ["include"],
+
+    export_shared_lib_headers: [
+        "android.hidl.memory@1.0",
+        "android.hidl.memory.block@1.0",
+        "android.hidl.memory.token@1.0",
+        "libhidlbase"
+    ],
+    srcs: [
+        "HidlMemoryCache.cpp",
+        "mapping.cpp"
+    ],
+}