Add BlimpClientContext and factory with real and dummy implementation

blimp/client/public/android/java/src/org/chromium/blimp_public/BlimpClientContext.java

Index: blimp/client/public/android/java/src/org/chromium/blimp_public/BlimpClientContext.java
diff --git a/blimp/client/public/android/java/src/org/chromium/blimp_public/BlimpClientContext.java b/blimp/client/public/android/java/src/org/chromium/blimp_public/BlimpClientContext.java
new file mode 100644
index 0000000000000000000000000000000000000000..ee497c21145e2eb906508db8c7e5d9fbf4275207
--- /dev/null
+++ b/blimp/client/public/android/java/src/org/chromium/blimp_public/BlimpClientContext.java
@@ -0,0 +1,20 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.blimp_public;
+
+/**
+ * BlimpClientContext is the Java representation of a native BlimpClientContext object.
+ * It is owned by the native BrowserContext.
+ *
+ * BlimpClientContext is the core class for the Blimp client. It provides hooks for creating
+ * BlimpContents and other features that are per BrowserContext/Profile.
+ */
+public interface BlimpClientContext {
+    /**
+     * Creates a {@link BlimpContents} and takes ownership of it. The caller must call
+     * {@link BlimpContents#destroy()} for destruction of the BlimpContents.
+     */
+    BlimpContents createBlimpContents();
+}