Update language to comply with Android's inclusive language guidance

See https://source.android.com/setup/contribute/respectful-code for reference

#inclusivefixit

Bug: 161896447
Change-Id: I839b1833dc06e00190f3557ca0292685197b1323
Test: NA (Comment only)
diff --git a/payload_consumer/download_action.h b/payload_consumer/download_action.h
index 740416d..6928443 100644
--- a/payload_consumer/download_action.h
+++ b/payload_consumer/download_action.h
@@ -124,7 +124,7 @@
   bool SetupP2PSharingFd();
 
   // Writes |length| bytes of payload from |data| into |file_offset|
-  // of the p2p file. Also does sanity checks; for example ensures we
+  // of the p2p file. Also does validation checks; for example ensures we
   // don't end up with a file with holes in it.
   //
   // This method does nothing if SetupP2PSharingFd() hasn't been