Replace llndk_library with llndk clause in cc_library

Remove the vestigial llndk_library and replace it with properties
in the llndk clause of the implementation cc_library.

Bug: 170784825
Test: m checkbuild
Test: compare out/soong/build.ninja
Change-Id: I960d7592fc71482e547f3617d0e55503c36cb63a

native/android/Android.bp

@@ -115,7 +115,11 @@ cc_library_shared {
 cc_library_shared {
     name: "libandroid_net",
     defaults: ["libandroid_defaults"],
-    llndk_stubs: "libandroid_net.llndk",
+    llndk: {
+        symbol_file: "libandroid_net.map.txt",
+        unversioned: true,
+        override_export_include_dirs: ["include"],
+    },
     srcs: ["net.c"],
 
     shared_libs: ["libnetd_client"],
@@ -123,13 +127,6 @@ cc_library_shared {
     include_dirs: ["bionic/libc/dns/include"],
 }
 
-llndk_library {
-    name: "libandroid_net.llndk",
-    export_include_dirs: ["include"],
-    symbol_file: "libandroid_net.map.txt",
-    unversioned: true,
-}
-
 // Aidl library for platform compat.
 cc_library_shared {
     name: "lib-platform-compat-native-api",