Start media.omx HIDL project.

Test: None

Bug: 31399200
Change-Id: I2fb1a6758ccc001c5631be1c642ad537d1ff5a10
diff --git a/media/omx/1.0/IOmxObserver.hal b/media/omx/1.0/IOmxObserver.hal
new file mode 100644
index 0000000..c26a937
--- /dev/null
+++ b/media/omx/1.0/IOmxObserver.hal
@@ -0,0 +1,35 @@
+/*
+ * 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.
+ */
+
+package android.hardware.media.omx@1.0;
+
+/**
+ * Ref: frameworks/av/include/media/IOMX.h: IOMXObserver
+ */
+
+/**
+ * IOmxObserver is a listener interface for OMX messages sent from an IOmxNode
+ * stance.
+ */
+interface IOmxObserver {
+
+    /**
+     * Invoked to process messages from an IOmxNode instance. Note that messages
+     * come in batches.
+     */
+    oneway onMessages(vec<Message> messages);
+};
+