Revert "Revert "Start auto-generating the stats log API.""

Test: builds successfully

This reverts commit 931945399859ab91545ba2c2a914f044092d5e2e.

Change-Id: I22bca4a32adf86040b9d72ad5b45999aba28f586
diff --git a/tools/stats_log_api_gen/Android.bp b/tools/stats_log_api_gen/Android.bp
new file mode 100644
index 0000000..a910c62
--- /dev/null
+++ b/tools/stats_log_api_gen/Android.bp
@@ -0,0 +1,98 @@
+//
+// Copyright (C) 2017 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.
+//
+
+// ==========================================================
+// Build the host executable: stats-log-api-gen
+// ==========================================================
+cc_binary_host {
+    name: "stats-log-api-gen",
+    srcs: [
+        "Collation.cpp",
+        "main.cpp",
+    ],
+
+    shared_libs: [
+        "libstats_proto_host",
+        "libprotobuf-cpp-full",
+    ],
+
+    proto: {
+        type: "full",
+    },
+}
+
+// ==========================================================
+// Build the host test executable: stats-log-api-gen
+// ==========================================================
+cc_test_host {
+    name: "stats-log-api-gen-test",
+    cflags: [
+        "-Wall",
+        "-Wextra",
+        "-Werror",
+        "-g",
+        "-DUNIT_TEST",
+    ],
+    srcs: [
+        "Collation.cpp",
+        "test_collation.cpp",
+        "test.proto",
+    ],
+
+    static_libs: [
+        "libgmock_host",
+    ],
+
+    shared_libs: [
+        "libstats_proto_host",
+    ],
+
+    proto: {
+        type: "full",
+    },
+}
+
+// ==========================================================
+// Native library
+// ==========================================================
+genrule {
+    name: "statslog.h",
+    tools: ["stats-log-api-gen"],
+    cmd: "$(location stats-log-api-gen) --header $(genDir)/statslog.h",
+    out: [
+        "statslog.h",
+    ],
+}
+
+genrule {
+    name: "statslog.cpp",
+    tools: ["stats-log-api-gen"],
+    cmd: "$(location stats-log-api-gen) --cpp $(genDir)/statslog.cpp",
+    out: [
+        "statslog.cpp",
+    ],
+}
+
+cc_library_shared {
+    name: "libstatslog",
+    generated_sources: ["statslog.cpp"],
+    generated_headers: ["statslog.h"],
+    export_generated_headers: ["statslog.h"],
+    shared_libs: [
+        "liblog",
+    ],
+}
+