Untie libnetd_client.so from libcutils

Identify debuggable build in bp file instead of reading
ro.debuggable property.

Test: make
Change-Id: If286c3e5490c93ad687e38631af9b11d90dd79f2
diff --git a/client/Android.bp b/client/Android.bp
index 7ed1810..85696cf 100644
--- a/client/Android.bp
+++ b/client/Android.bp
@@ -20,8 +20,6 @@
         "NetdClient.cpp",
     ],
 
-    shared_libs: ["libcutils"],
-
     header_libs: ["libnetd_client_headers"],
     export_header_lib_headers: ["libnetd_client_headers"],
 
@@ -34,4 +32,10 @@
         "-Wall",
         "-Werror",
     ],
+
+    product_variables: {
+        debuggable: {
+            cflags: ["-DNETD_CLIENT_DEBUGGABLE_BUILD"],
+        }
+    }
 }