Doc change: cherry-pick from master: Activity Testing/Hello, Testing tutorials doc files

Change-Id: If43ba08af00c8c9fcf6d05834f8b2a7a719b4bec
diff --git a/Android.mk b/Android.mk
index 8783934..52136dd 100644
--- a/Android.mk
+++ b/Android.mk
@@ -411,6 +411,10 @@
 		            resources/samples/Snake "Snake" \
 		-samplecode $(sample_dir)/SoftKeyboard \
 		            resources/samples/SoftKeyboard "Soft Keyboard" \
+		-samplecode $(sample_dir)/Spinner  \
+		            resources/samples/Spinner "Spinner" \
+		-samplecode $(sample_dir)/SpinnerTest \
+		            resources/samples/SpinnerTest "SpinnerTest" \
 		-samplecode $(sample_dir)/Wiktionary \
 		            resources/samples/Wiktionary "Wiktionary" \
 		-samplecode $(sample_dir)/WiktionarySimple \