Android: Add skia_unittests to the list of stable test suites.

skia/skia_tests.gyp

Index: skia/skia_tests.gyp
diff --git a/skia/skia_tests.gyp b/skia/skia_tests.gyp
index 250ff1f0296da6f2ba672bc3fe62faa2b3d47295..fcc73476402f24e26b30d27306bf6d6b6bbeca8a 100644
--- a/skia/skia_tests.gyp
+++ b/skia/skia_tests.gyp
@@ -42,6 +42,11 @@
             'ext/platform_canvas_unittest.cc',
           ],
         }],
+        ['OS == "android"', {
+          'dependencies': [
+            '../testing/android/native_test.gyp:native_test_native_code',
+          ],
+        }],
       ],
     },
   ],