Add llndk_library for libvulkan

This commit adds a llndk_library module definition for libvulkan so
that vendor modules can depend on libvulkan (like libGLESv2).

Bug: 72426809
Test: lunch aosp_walleye-userdebug && make -j8
Change-Id: I78d756fc6915fed06ba4c8998ef67f44c668f1c1
diff --git a/vulkan/Android.bp b/vulkan/Android.bp
index 6107088..68d9402 100644
--- a/vulkan/Android.bp
+++ b/vulkan/Android.bp
@@ -43,6 +43,12 @@
     sdk_version: "24",
 }
 
+llndk_library {
+    name: "libvulkan",
+    symbol_file: "libvulkan/libvulkan.map.txt",
+    export_include_dirs: ["include"],
+}
+
 subdirs = [
     "nulldrv",
     "libvulkan",