fido: enable WebAuthenticationBiometricEnrollment by default

This default-enables FIDO2 fingerprint enrollment UI in
chrome://settings/securityKeys

Bug: 974046
Change-Id: I2c707943a10c588798b6704aa1416e246fe6d3e8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1895310
Auto-Submit: Martin Kreichgauer <martinkr@google.com>
Commit-Queue: Ken Buchanan <kenrb@chromium.org>
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715892}

device/fido/features.cc

@@ -17,7 +17,7 @@ const base::Feature kWebAuthUseNativeWinApi{"WebAuthenticationUseNativeWinApi",
 #endif  // defined(OS_WIN)
 
 extern const base::Feature kWebAuthBiometricEnrollment{
-    "WebAuthenticationBiometricEnrollment", base::FEATURE_DISABLED_BY_DEFAULT};
+    "WebAuthenticationBiometricEnrollment", base::FEATURE_ENABLED_BY_DEFAULT};
 
 extern const base::Feature kWebAuthCredentialManagement{
     "WebAuthenticationCredentialManagement", base::FEATURE_ENABLED_BY_DEFAULT};