Update sepolicy to use inclusive language

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

#inclusivefixit

Bug: 161896447
Test: Build
Change-Id: If612f2270c8ba1d7fc2cbda3b2e8ca3818c0a1be
diff --git a/tools/insertkeys.py b/tools/insertkeys.py
index ca1e432..51b4ab6 100755
--- a/tools/insertkeys.py
+++ b/tools/insertkeys.py
@@ -56,7 +56,7 @@
                 # If we ended the certificate trip the flag
                 inCert = False
 
-                # Sanity check the input
+                # Check the input
                 if len(base64Key) == 0:
                     sys.exit("Empty certficate , certificate "+ str(certNo) + " found in file: "
                             + path)