LLNDK version maps to NDK version

Instead of annotation duplicate LLNDK versions, use a corresponding
NDK version to find LLNDK symbols.
To generate LLNDK stubs, ndkstubgen sets `--llndk` argument with the
corresponding SDK version to its `--api` argument.

Bug: 361077712
Test: atest test_ndkstubgen
      atest test_symbolfile
Change-Id: I64cd6eaeae4451326bf2e74b4d2639933f004393
diff --git a/android/Android.bp b/android/Android.bp
index a9a3564..dfea8f9 100644
--- a/android/Android.bp
+++ b/android/Android.bp
@@ -111,6 +111,7 @@
         "testing.go",
         "util.go",
         "variable.go",
+        "vendor_api_levels.go",
         "vintf_fragment.go",
         "vintf_data.go",
         "visibility.go",