display: Enable clang for all display modules

Change-Id: I71e3fa3f7d44253b8e01d1eafe086b1898d65a8e
diff --git a/libqservice/Android.mk b/libqservice/Android.mk
index 287e6ce..285afca 100644
--- a/libqservice/Android.mk
+++ b/libqservice/Android.mk
@@ -6,7 +6,8 @@
 LOCAL_MODULE_TAGS             := optional
 LOCAL_C_INCLUDES              := $(common_includes) $(kernel_includes)
 LOCAL_SHARED_LIBRARIES        := $(common_libs) libbinder
-LOCAL_CFLAGS                  := $(common_flags) -DLOG_TAG=\"qdqservice\"
+LOCAL_CFLAGS                  := $(common_flags) -DLOG_TAG=\"qdqservice\" -Wno-sign-conversion
+LOCAL_CLANG                   := true
 LOCAL_ADDITIONAL_DEPENDENCIES := $(common_deps)
 LOCAL_SRC_FILES               := QService.cpp \
                                  IQService.cpp \