Native puller API: libstatspulled

Create a new library for the native puller callback API. The library has
2 main interfaces: register_stats_pull_atom_callback, which is used to
register a callback, and stats_pull_atom_callback_t, which is the
callback for the puller. It also exposes pulled_stats_event_list, which
is a struct wrapper around a vector of stats_event.

Test: make libstatspull
Bug: 142969725

Change-Id: I14fe4dc523d6f81fdeaa3fe6fad3e95aeecfe92e
diff --git a/lib/libstatspull/Android.bp b/lib/libstatspull/Android.bp
new file mode 100644
index 0000000..9772da1
--- /dev/null
+++ b/lib/libstatspull/Android.bp
@@ -0,0 +1,41 @@
+//
+// 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.
+//
+
+// ==========================================================
+// Native library to register a pull atom callback with statsd
+// ==========================================================
+cc_library_shared {
+    name: "libstatspull",
+    srcs: [
+        ":statsd_aidl",
+        "stats_pull_atom_callback.cpp",
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    export_include_dirs: ["include"],
+    shared_libs: [
+        //TODO: use libbinder_ndk.
+        "libbinder",
+        "libstatssocket",
+        "libservices",
+    ],
+    static_libs: [
+        "liblog",
+        "libutils",
+    ]
+}