Rely on the platform -std default.

Bug: http://b/32019064
Test: builds
Change-Id: I917cddbb456f3d6fbefa3617844bb2af59a0d3a8

client/Android.mk

@@ -18,7 +18,7 @@ include $(CLEAR_VARS)
 
 LOCAL_C_INCLUDES := bionic/libc/dns/include system/netd/include
 LOCAL_CLANG := true
-LOCAL_CPPFLAGS := -std=c++11 -Wall -Werror
+LOCAL_CPPFLAGS := -Wall -Werror
 LOCAL_MODULE := libnetd_client
 LOCAL_SRC_FILES := FwmarkClient.cpp NetdClient.cpp
 

server/Android.mk

@@ -46,7 +46,7 @@ LOCAL_C_INCLUDES := \
         system/netd/include \
 
 LOCAL_CLANG := true
-LOCAL_CPPFLAGS := -std=c++11 -Wall -Werror
+LOCAL_CPPFLAGS := -Wall -Werror
 LOCAL_MODULE := netd
 
 # Bug: http://b/29823425 Disable -Wvarargs for Clang update to r271374