Allowlist prebuilt version aapt2

Bug: 303786272
Test: CI + Manual build
Change-Id: I0a748430e4f2c4d77c6564562c3a85b0dc4368e4
diff --git a/android/allowlists/allowlists.go b/android/allowlists/allowlists.go
index 40bbf4d..46f9e8f 100644
--- a/android/allowlists/allowlists.go
+++ b/android/allowlists/allowlists.go
@@ -672,6 +672,7 @@
 
 		// prebuilts
 		"prebuilt_stats-log-api-gen",
+		"prebuilt_aapt2",
 
 		// fastboot
 		"fastboot",