Clean up Android.mk file.

Removes a spurious line and adds an empty line for consistency with
the other target.

Change-Id: I72eec6ad72093d771dd0a6b2296c1adbaaa2d347
diff --git a/common/m2/Android.mk b/common/m2/Android.mk
index 61717ed..482d89f 100644
--- a/common/m2/Android.mk
+++ b/common/m2/Android.mk
@@ -21,11 +21,10 @@
 # com.squareup.haha prebuilt.
 
 include $(CLEAR_VARS)
+
 LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := \
     squareup-haha-prebuilt:repository/com/squareup/haha/haha/1.3/haha-1.3.jar
 
 include $(BUILD_MULTI_PREBUILT)
 
-include $(CLEAR_VARS)
-
 ###########################################