Update language to comply with Android's inclusive language guidance

See https://source.android.com/setup/contribute/respectful-code for reference
 
Test: Presubmit
Bug: 161896447

Change-Id: I89dbc737c62a796d3622cf17437f9eac930c99b3
diff --git a/src/com/android/settings/password/ConfirmDeviceCredentialActivity.java b/src/com/android/settings/password/ConfirmDeviceCredentialActivity.java
index 8476f92..fbc2c3c 100644
--- a/src/com/android/settings/password/ConfirmDeviceCredentialActivity.java
+++ b/src/com/android/settings/password/ConfirmDeviceCredentialActivity.java
@@ -318,7 +318,7 @@
         boolean launched = false;
         // The only difference between CREDENTIAL_MANAGED and CREDENTIAL_NORMAL is that for
         // CREDENTIAL_MANAGED, we launch the real confirm credential activity with an explicit
-        // but dummy challenge value (0L). This will result in ConfirmLockPassword calling
+        // but fake challenge value (0L). This will result in ConfirmLockPassword calling
         // verifyTiedProfileChallenge() (if it's a profile with unified challenge), due to the
         // difference between ConfirmLockPassword.startVerifyPassword() and
         // ConfirmLockPassword.startCheckPassword(). Calling verifyTiedProfileChallenge() here is