dataservices: Makefile changes to enable CLANG

Update the makefiles to enable CLANG compilation. Also fix the
corresponding warnings and errors caused by CLANG enablement.

CRs-Fixed: 971746
Change-Id: I16dd64aaf219a59aba6a612002dab78c877cb8b9
diff --git a/rmnetctl/src/Android.mk b/rmnetctl/src/Android.mk
index 86c70ef..9390143 100644
--- a/rmnetctl/src/Android.mk
+++ b/rmnetctl/src/Android.mk
@@ -12,7 +12,7 @@
 LOCAL_C_INCLUDES += $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr/include
 LOCAL_ADDITIONAL_DEPENDENCIES := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr
 
-
+LOCAL_CLANG := true
 LOCAL_MODULE := librmnetctl
 LOCAL_MODULE_TAGS := optional
 LOCAL_PRELINK_MODULE := false