Fix build breakage caused by upgrading to 7.2.1

Moved libprotobuf-java-nano to LOCAL_STATIC_JAVA_LIBRARIES to
make sure that it is available to all clients.

Bug: 24793335
Change-Id: Iefb21cbd33e2bb0427f8e8687329c3bc8f519eba
diff --git a/Android.mk b/Android.mk
index add9693..dd9be70 100644
--- a/Android.mk
+++ b/Android.mk
@@ -68,7 +68,7 @@
 LOCAL_JAVA_RESOURCE_DIRS := $(libphonenumber_resource_dirs)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
 LOCAL_SDK_VERSION := 9
-LOCAL_JAVA_LIBRARIES := libprotobuf-java-nano
+LOCAL_STATIC_JAVA_LIBRARIES := libprotobuf-java-nano
 include $(BUILD_STATIC_JAVA_LIBRARY)
 
 # Tests for unbundled use.