Make the connection between implementation and llndk_library explicit

Instead of assuming a module with the .llndk suffix exists, add an
llndk_stubs property to every cc_library module that has a
corresponding llndk_library.  Also rename the llndk_library to have
an explicit .llndk suffix.

Bug: 170784825
Test: no changes to build.ninja (excluding comments) or Android-${TARGET_PRODUCT}.mk
Change-Id: Ic4fa093f126490394909867a08448ed886bc5955
diff --git a/vulkan/libvulkan/Android.bp b/vulkan/libvulkan/Android.bp
index f69de1f..921b095 100644
--- a/vulkan/libvulkan/Android.bp
+++ b/vulkan/libvulkan/Android.bp
@@ -21,7 +21,7 @@
 }
 
 llndk_library {
-    name: "libvulkan",
+    name: "libvulkan.llndk",
     symbol_file: "libvulkan.map.txt",
     export_llndk_headers: [
         "vulkan_headers_llndk",
@@ -30,6 +30,7 @@
 
 cc_library_shared {
     name: "libvulkan",
+    llndk_stubs: "libvulkan.llndk",
     clang: true,
     sanitize: {
         misc_undefined: ["integer"],