Enable COOP:RP origin trial

Intent to experiment: https://groups.google.com/u/1/a/chromium.org/g/blink-dev/c/JBTWXSHE8M0?pli=1

The trial has started on the dashboard [1], but we forgot to enable
the feature that checks the trial token.

[1] https://developer.chrome.com/origintrials/#/view_trial/1827335548805578753

Bug: 1221127
Change-Id: Ib25ba0144d0cd324c3323ce3cd6c358749318656
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4640221
Reviewed-by: Colin Blundell <blundell@chromium.org>
Commit-Queue: Jonathan Hao <phao@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1161696}

services/network/public/cpp/features.cc

@@ -84,7 +84,7 @@ BASE_FEATURE(kCoopRestrictProperties,
 // allows us to keep using CoopRestrictProperties to enable COOP: RP for WPTs.
 BASE_FEATURE(kCoopRestrictPropertiesOriginTrial,
              "CoopRestrictPropertiesOriginTrial",
-             base::FEATURE_DISABLED_BY_DEFAULT);
+             base::FEATURE_ENABLED_BY_DEFAULT);
 
 // Enables or defaults splittup up server (not proxy) entries in the
 // HttpAuthCache.