First implementation of the Neural Networks API.

This first version can run a simple query on the CPU either
via the fallback path or through a simulated driver.

This code has many deficiencies: single threaded, not all
validation are done, not going through HIDL, and not
enough unit tests.  Expect more changes!

Test: Compiled and ran the unit tests

Change-Id: I9f6a485a2e7207aeb5f91a2904dcb4b7fd8a6f65

common/Android.bp

diff --git a/common/Android.bp b/common/Android.bp
new file mode 100644
index 0000000..8f00067
--- /dev/null
+++ b/common/Android.bp
@@ -0,0 +1,33 @@
+/*
+ * Copyright 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.
+ */
+
+cc_library_static {
+    name: "libneuralnetworks_common",
+    defaults: ["neuralnetworks_defaults"],
+    host_supported: true,
+    export_include_dirs: ["include"],
+
+    srcs: [
+        "CpuExecutor.cpp",
+        "Operations.cpp",
+        "OperationsUtils.cpp",
+        "Utils.cpp",
+    ],
+
+    header_libs: [
+        "libneuralnetworks_headers",
+    ],
+}