docs: correct the record that android never reports a secure field

Four places said android reports the fact for nothing and that every typed
value there is redacted. The sidecar now states it, so they described the
old behaviour.

conformance/testdata/generate.py

@@ -12,8 +12,8 @@ BASE = datetime(2026, 6, 6, 12, 0, 0, tzinfo=timezone(timedelta(hours=5, minutes
 
 
 # What a typed value is written to the trace as when the target reports no
-# secure fact for the field. Android reports none for any field, so every
-# InputText it records reads this (internal/verifier/redaction.go).
+# secure fact for the field, which is what the android fixtures below model
+# (internal/verifier/redaction.go).
 REDACTED = "[redacted]"