bluetooth: web: Rename Blacklist to Blocklist

testing/variations/fieldtrial_testing_config.json

 {
     "AndroidSessionNotifications": [
         {
             "platforms": [
                 "android"
             ],
             "experiments": [
                 {
                     "name": "Disabled"
                 }
@@ skipping 2232 matching lines @@
             "experiments": [
                 {
                     "name": "Enabled",
                     "enable_features": [
                         "ViewsSimplifiedFullscreenUI"
                     ]
                 }
             ]
         }
     ],
-    "WebBluetoothBlacklist": [
+    "WebBluetoothBlocklist": [
         {
             "platforms": [
                 "android",
                 "chromeos",
                 "linux",
                 "mac",
                 "win"
             ],
             "experiments": [
                 {
                     "//1": "The value 'ed5f25a4:e' is included for the",
-                    "//2": "WebBluetoothTest BlacklistShouldBlock test.",
+                    "//2": "WebBluetoothTest BlocklistShouldBlock test.",
                     "//3": "TODO(643013): Remove other values in Chrome 55 or later.",
                     "name": "TestGroup",
                     "params": {
-                        "blacklist_additions": "00060000:e,fffd:e,ed5f25a4:e"
+                        "blocklist_additions": "00060000:e,fffd:e,ed5f25a4:e"
                     }
                 }
             ]
         }
     ],
     "WebFontsInterventionV2": [
         {
             "platforms": [
                 "android",
                 "chromeos",
@@ skipping 74 matching lines @@
                 {
                     "name": "Enabled",
                     "enable_features": [
                         "use-new-media-cache"
                     ]
                 }
             ]
         }
     ]
 }