Update sample templates for android-23 release

Converted "android-MNC" build target references (including
min/compile) to use "23" instead, to correspond with
recent SDK builds.

Includes source file refresh.

Change-Id: I441aba7b50d16179cc231531e6aeffd108cdd404
diff --git a/testing/ActivityInstrumentation/README.md b/testing/ActivityInstrumentation/README.md
index 4ba39f6..49496f7 100644
--- a/testing/ActivityInstrumentation/README.md
+++ b/testing/ActivityInstrumentation/README.md
@@ -1,5 +1,6 @@
+
 Android ActivityInstrumentation Sample
-==============================
+===================================
 
 This sample provides a basic example of using an InstrumentationTest to probe the
 internal state of an Activity.
@@ -7,8 +8,8 @@
 Pre-requisites
 --------------
 
-- Android SDK v20
-- Android Build Tools v20
+- Android SDK v23
+- Android Build Tools v22.0.1
 - Android Support Repository
 
 Getting Started
@@ -41,7 +42,7 @@
 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
+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