Specify SDK version for RS graphics tests.

Change-Id: Ia61c753392432b91f91260a9b8769dfd396c259f
diff --git a/tests/RenderScriptTests/ShadersTest/Android.mk b/tests/RenderScriptTests/ShadersTest/Android.mk
index 0912591..fb6356e 100644
--- a/tests/RenderScriptTests/ShadersTest/Android.mk
+++ b/tests/RenderScriptTests/ShadersTest/Android.mk
@@ -21,6 +21,8 @@
 
 LOCAL_SRC_FILES := $(call all-java-files-under, src) $(call all-renderscript-files-under, src)
 
+LOCAL_SDK_VERSION := 17
+
 LOCAL_PACKAGE_NAME := ShadersTest
 
 include $(BUILD_PACKAGE)