Add Android Shadow sample

gyp/samples.gypi

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 # Include this gypi to include all 'sample' files
 {
   'include_dirs': [
     '../include/views',
     '../experimental',
     '../samplecode',
     '../tools',
   ],
   'sources': [
     # Samples
     '../samplecode/GMSampleView.h',
     '../samplecode/GMSampleView.cpp',
     '../samplecode/ClockFaceView.cpp',
     '../samplecode/OverView.cpp',
     '../samplecode/OverView.h',
     '../samplecode/PerlinPatch.cpp',
     '../samplecode/Sample2PtRadial.cpp',
     '../samplecode/SampleAAClip.cpp',
     '../samplecode/SampleAAGeometry.cpp',
     '../samplecode/SampleAARects.cpp',
     '../samplecode/SampleAARectModes.cpp',
     '../samplecode/SampleAll.cpp',
+    '../samplecode/SampleAndroidShadows.cpp',
     '../samplecode/SampleAnimatedText.cpp',
     '../samplecode/SampleAnimBlur.cpp',
     '../samplecode/SampleArc.cpp',
     '../samplecode/SampleAtlas.cpp',
     '../samplecode/SampleBigBlur.cpp',
     '../samplecode/SampleBigGradient.cpp',
     '../samplecode/SampleBitmapRect.cpp',
     '../samplecode/SampleBlur.cpp',
     '../samplecode/SampleCamera.cpp',
     '../samplecode/SampleChart.cpp',
@@ skipping 98 matching lines @@
   ],      
   'dependencies': [
     'experimental.gyp:experimental',
     'lua.gyp:lua',
     'pdf.gyp:pdf',
     'svg.gyp:svgdom',
     'views.gyp:views',
     'xml.gyp:xml',
   ],
 }