Move support library media router to v7 package.

Resolved some TODOs related to missing resources.

Bug: 8175766
Change-Id: I57632d0a961de58a5dd53e889b4fd39832b5fba0
diff --git a/v7/mediarouter/AndroidManifest.xml b/v7/mediarouter/AndroidManifest.xml
new file mode 100644
index 0000000..f22f80f
--- /dev/null
+++ b/v7/mediarouter/AndroidManifest.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2013 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.
+-->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="android.support.v7.mediarouter">
+    <uses-sdk android:minSdkVersion="7"/>
+</manifest>