Adding PIP logic for phones.

- Adding basic behavior to move PIP window and launch back into
  fullscreen, as well as drag it to dismiss.

Test: Deferring CTS tests as this interaction is only temporary and not
      final

Change-Id: I5272a045090c20c45b345813d10dc385c3f83221
diff --git a/packages/SystemUI/src/com/android/systemui/pip/phone/PipManager.java b/packages/SystemUI/src/com/android/systemui/pip/phone/PipManager.java
new file mode 100644
index 0000000..53a4868
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/pip/phone/PipManager.java
@@ -0,0 +1,66 @@
+/*
+ * 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 com.android.systemui.pip.phone;
+
+import android.app.ActivityManagerNative;
+import android.app.IActivityManager;
+import android.content.Context;
+import android.view.IWindowManager;
+import android.view.WindowManagerGlobal;
+
+/**
+ * Manages the picture-in-picture (PIP) UI and states for Phones.
+ */
+public class PipManager {
+    private static final String TAG = "PipManager";
+
+    private static PipManager sPipController;
+
+    private Context mContext;
+    private IActivityManager mActivityManager;
+    private IWindowManager mWindowManager;
+
+    private PipTouchHandler mTouchHandler;
+
+    private PipManager() {}
+
+    /**
+     * Initializes {@link PipManager}.
+     */
+    public void initialize(Context context) {
+        mContext = context;
+        mActivityManager = ActivityManagerNative.getDefault();
+        mWindowManager = WindowManagerGlobal.getWindowManagerService();
+
+        mTouchHandler = new PipTouchHandler(context, mActivityManager, mWindowManager);
+    }
+
+    /**
+     * Updates the PIP per configuration changed.
+     */
+    public void onConfigurationChanged() {}
+
+    /**
+     * Gets an instance of {@link PipManager}.
+     */
+    public static PipManager getInstance() {
+        if (sPipController == null) {
+            sPipController = new PipManager();
+        }
+        return sPipController;
+    }
+}