Add com.android.tzdata to AOSP staging allowlist.

Test: presubmits
Change-Id: I7d9edb56273375579edf3b8a5466570df6073668
diff --git a/android/allowlists/allowlists.go b/android/allowlists/allowlists.go
index 529285f..16f144e 100644
--- a/android/allowlists/allowlists.go
+++ b/android/allowlists/allowlists.go
@@ -1349,5 +1349,5 @@
 	// Staging-mode allowlist. Modules in this list are only built
 	// by Bazel with --bazel-mode-staging. This list should contain modules
 	// which will soon be added to the prod allowlist.
-	StagingMixedBuildsEnabledList = []string{}
+	StagingMixedBuildsEnabledList = []string{"com.android.tzdata"}
 )