Update language to comply with Android's inclusive language guidance

More details in: https://source.android.com/setup/contribute/respectful-code

Bug: 161896447
Test: build, run unittests
Change-Id: I8d666eee75490146eb57a183f0cfdf343b58b602
diff --git a/payload_generator/payload_signer.h b/payload_generator/payload_signer.h
index 06e4823..9676b71 100644
--- a/payload_generator/payload_signer.h
+++ b/payload_generator/payload_signer.h
@@ -62,7 +62,7 @@
   // size in |metadata_signature_size| and signatures offset in
   // |signatures_offset|, calculates the payload signature blob into
   // |out_serialized_signature|. Note that the payload must already have an
-  // updated manifest that includes the dummy signature op and correct metadata
+  // updated manifest that includes the fake signature op and correct metadata
   // signature size in header. Returns true on success, false otherwise.
   static bool SignPayload(const std::string& unsigned_payload_path,
                           const std::vector<std::string>& private_key_paths,
@@ -92,7 +92,7 @@
                                     brillo::Blob* out_payload_hash_data,
                                     brillo::Blob* out_metadata_hash);
 
-  // Given an unsigned payload in |payload_path| (with no dummy signature op)
+  // Given an unsigned payload in |payload_path| (with no fake signature op)
   // and the raw |payload_signatures| and |metadata_signatures| updates the
   // payload to include the signature thus turning it into a signed payload. The
   // new payload is stored in |signed_payload_path|. |payload_path| and