Tool to create license metadata for copied target.

Bug: 213388645

Test: m copy_license_metadata
Test: m cts dist reportmissinglicenses

Change-Id: I75c196ceca221effb2d6c972e250f5d42854e42f
diff --git a/android/licenses.go b/android/licenses.go
index 81c557e..c47b3e6 100644
--- a/android/licenses.go
+++ b/android/licenses.go
@@ -331,6 +331,8 @@
 func licensesMakeVarsProvider(ctx MakeVarsContext) {
 	ctx.Strict("BUILD_LICENSE_METADATA",
 		ctx.Config().HostToolPath(ctx, "build_license_metadata").String())
+	ctx.Strict("COPY_LICENSE_METADATA",
+		ctx.Config().HostToolPath(ctx, "copy_license_metadata").String())
 	ctx.Strict("HTMLNOTICE", ctx.Config().HostToolPath(ctx, "htmlnotice").String())
 	ctx.Strict("XMLNOTICE", ctx.Config().HostToolPath(ctx, "xmlnotice").String())
 	ctx.Strict("TEXTNOTICE", ctx.Config().HostToolPath(ctx, "textnotice").String())