Create bp2build converter for versioned_ndk_headers

This module type is used by a single soong module - `common_libc` in
bionic/libc

Implementation details
- Convert this module type to ndk_headers rule. Bazel's ndk_headers rule
  will have a boolean attribute `run_versioner` to determine if
  verioner should be run on the headers
- Add this module type to the alwaysConvert bp2build list
- Add the converted target for `common_libc` to the deps of
  `ndk_sysroot`. This ensures that unbundled apps link against the
  versioned NDK headers of libc

Test: go test ./bp2build
Test: b build //bionic/libc:common_libc --config=android
Test: for f in $(find bazel-bin/bionic/libc/common_libc.versioned -type f); do cmp $f ${f/bazel-bin\/bionic\/libc\/common_libc.versioned/out\/soong\/ndk\/sysroot\/usr\/include}; done # no diff

Bug: 301169067

Change-Id: I55be202f0589db9bdc743c8be41c9c5afd74c352

bp2build/build_conversion.go

@@ -576,7 +576,7 @@ func createBuildConversionMetadata(ctx *android.Context) buildConversionMetadata
 				Dir:  ctx.ModuleDir(m),
 				Deps: m.(*bootstrap.GoPackage).Deps(),
 			}
-		} else if moduleType == "ndk_headers" {
+		} else if moduleType == "ndk_headers" || moduleType == "versioned_ndk_headers" {
 			ndkHeaders = append(ndkHeaders, m)
 		}
 	})