Revert of Remove Android SampleApp

platform_tools/android/gyp/dependencies.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.
 
 # This GYP file stores the dependencies necessary to build Skia on the Android
 # platform. The OS doesn't provide many stable libraries as part of the
 # distribution so we have to build a few of them ourselves.
 #
 # NOTE: We tried adding the gyp file to the android/ directory at the root of
@@ skipping 71 matching lines @@
           # we're guaranteed that '_type' will be defined when we get here.
           # For more info, see:
           # - http://code.google.com/p/gyp/wiki/InputFormatReference#Variables
           # - http://codereview.appspot.com/6353065/
           ['_type == "executable"', {
             'type': 'shared_library',
           }],
         ],
       },
     },
+    {
+      # This target is a dependency for Skia Sample application which runs on
+      # Android.  Since Android requires us to load native code in shared
+      # libraries, we need a common entry point to wrap around main(). Here
+      # we also change the type of all would-be executables to be shared
+      # libraries.  The alternative would be to introduce a condition in every
+      # executable target which changes to a shared library if the target OS is
+      # Android.  This is nicer because the switch is in one place.
+      'target_name': 'Android_SampleApp',
+      'type': 'static_library',
+      'direct_dependent_settings': {
+        'target_conditions': [
+          # '_type' is an 'automatic variable' which is defined for any
+          # target which defines a key-value pair with 'type' as the key (so,
+          # all of them).  Conditionals inside 'target_conditions' are evaluated
+          # *after* all other definitions and conditionals are evaluated, so
+          # we're guaranteed that '_type' will be defined when we get here.
+          # For more info, see:
+          # - http://code.google.com/p/gyp/wiki/InputFormatReference#Variables
+          # - http://codereview.appspot.com/6353065/
+          ['_type == "executable"', {
+            'type': 'shared_library',
+          }],
+        ],
+        'cflags': [
+          '-Wno-unused-private-field',
+        ],
+        'sources': [
+          '../apps/sample_app/src/main/jni/com_skia_SkiaSampleRenderer.cpp',
+        ],
+      },
+    },
   ]
 }