Fix bug: allow multiple gen_notice modules.

Test: m cts dist reportmissinglicenses

Change-Id: I07963c83eaddfe363a04871e813b56fe7f1465ad
diff --git a/apex/builder.go b/apex/builder.go
index f959b7a..9119363 100644
--- a/apex/builder.go
+++ b/apex/builder.go
@@ -618,7 +618,7 @@
 
 		// Create a NOTICE file, and embed it as an asset file in the APEX.
 		a.htmlGzNotice = android.PathForModuleOut(ctx, "NOTICE.html.gz")
-		android.BuildNoticeHtmlOutputFromLicenseMetadata(ctx, a.htmlGzNotice, "", unsignedOutputFile.String())
+		android.BuildNoticeHtmlOutputFromLicenseMetadata(ctx, a.htmlGzNotice, "", "", unsignedOutputFile.String())
 		noticeAssetPath := android.PathForModuleOut(ctx, "NOTICE", "NOTICE.html.gz")
 		builder := android.NewRuleBuilder(pctx, ctx)
 		builder.Command().Text("cp").