Move neuralnetworks HAL to hardware/interfaces

The neuralnetworks hal was placed in
frameworks/ml/nn/hardware/interfaces while VTS tests were being
developed.

This CL moves it to hardware/interfaces and another CL removes
it from frameworks/ml/nn/hardware/interfaces.

VTS tests included in a sibling CL in this topic.

Bug: 63905942
Test: mm -j40
Change-Id: I0e6c84de72a763edbaef3e9b3063c3ecca216337
diff --git a/neuralnetworks/1.0/IDevice.hal b/neuralnetworks/1.0/IDevice.hal
new file mode 100644
index 0000000..b826b23
--- /dev/null
+++ b/neuralnetworks/1.0/IDevice.hal
@@ -0,0 +1,31 @@
+/*
+ * 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.
+ */
+
+/* This HAL is a work in progress */
+
+package android.hardware.neuralnetworks@1.0;
+
+import IPreparedModel;
+
+interface IDevice {
+    initialize() generates(Capabilities capabilities);
+
+    getSupportedSubgraph(Model model) generates(vec<bool> supported);
+
+    prepareModel(Model model) generates(IPreparedModel preparedModel);
+
+    getStatus() generates(DeviceStatus status);
+};