Bump objenesis to SDK 10.

SDK 9 doesn't appear to be an officially supported API level.
The API 9 platform isn't available through the SDK manager.

Change-Id: I8a81821b0d01b7dbaafebd05d56f06d24f236e18
diff --git a/Android.mk b/Android.mk
index afaa5b4..7efbb45 100644
--- a/Android.mk
+++ b/Android.mk
@@ -33,7 +33,7 @@
 # ideally this should be called just 'objenesis', but that name is
 # already used by a prebuilt host lib.
 LOCAL_MODULE := objenesis-target
-#  SDK 9 needed for ObjectStreamClass lookupAny
-LOCAL_SDK_VERSION := 9
+#  SDK 10 needed for ObjectStreamClass lookupAny
+LOCAL_SDK_VERSION := 10
 LOCAL_MODULE_TAGS := optional
 include $(BUILD_STATIC_JAVA_LIBRARY)