Handle universal APK case in extract_apks

Cherrypick of ag/11553550

Bug: 157081961
Test: manual and builtin

Merged-In: I5ac64c845328a54024171da41c369050243462b0
Change-Id: I3ebc4a84501623774b78c9c19628994c1d71dc64
diff --git a/cmd/extract_apks/main.go b/cmd/extract_apks/main.go
index a638db2..e9a850e 100644
--- a/cmd/extract_apks/main.go
+++ b/cmd/extract_apks/main.go
@@ -374,6 +374,10 @@
 			regexp.MustCompile(`^.*/` + selected.moduleName + `(-.*\.apk)$`),
 			config.stem + `$1`,
 		},
+		{
+			regexp.MustCompile(`^universal\.apk$`),
+			config.stem + ".apk",
+		},
 	}
 	renamer := func(path string) (string, bool) {
 		for _, rr := range renameRules {