digitalgoods: Reland origin trial for M88

This reverts commit ae799285.

Reason for revert: Origin trial skipped for M87, which has now
branched. Want to start origin trial in M88.

Original change's description:
> digitalgoods: Remove origin trial for DigitalGoods.
>
> This reverts commit 13771712.
>
> Reason for revert: Decided not to move to OT in M87. Delay to M88.
>
> Original change's description:
> > digitalgoods: Add origin_trial_feature_name and _os for DigitalGoods.
> >
> > Origin Trial on Android only for now.
> >
> > Bug: 1032423,1096428
> > Change-Id: I8329c798138d800156bbe3f90de6d05f2d9662b2
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2404284
> > Reviewed-by: Kentaro Hara <haraken@chromium.org>
> > Auto-Submit: Glen Robertson <glenrob@chromium.org>
> > Commit-Queue: Glen Robertson <glenrob@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#807337}
>
> Bug: 1032423
> Bug: 1096428
> Change-Id: If0f670b5901c8efc3452bb557bc33d2f5f3aecf3
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2437719
> Reviewed-by: Glen Robertson <glenrob@chromium.org>
> Reviewed-by: Kentaro Hara <haraken@chromium.org>
> Reviewed-by: Peter Conn <peconn@chromium.org>
> Auto-Submit: Glen Robertson <glenrob@chromium.org>
> Commit-Queue: Glen Robertson <glenrob@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#812519}

Bug: 1032423,1096428
Change-Id: I787a43ce82820136a65363c5be46ec035cb79ddf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2494187
Commit-Queue: Glen Robertson <glenrob@chromium.org>
Commit-Queue: Kentaro Hara <haraken@chromium.org>
Auto-Submit: Glen Robertson <glenrob@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Glen Robertson <glenrob@chromium.org>
Cr-Commit-Position: refs/heads/master@{#820129}

third_party/blink/renderer/modules/payments/payment_request.cc

@@ -599,7 +599,8 @@ void ValidateAndConvertPaymentDetailsUpdate(const PaymentDetailsUpdate* input,
   if (exception_state.HadException())
     return;
   if (input->hasTotal()) {
-    DCHECK(!RuntimeEnabledFeatures::DigitalGoodsEnabled() || !ignore_total);
+    DCHECK(!RuntimeEnabledFeatures::DigitalGoodsEnabled(&execution_context) ||
+           !ignore_total);
     if (ignore_total) {
       output->total =
           CreateTotalPlaceHolderForAppStoreBilling(execution_context);
@@ -1248,8 +1249,9 @@ PaymentRequest::PaymentRequest(
   if (exception_state.HadException())
     return;
 
-  ignore_total_ = RuntimeEnabledFeatures::DigitalGoodsEnabled() &&
-                  RequestingOnlyAppStoreBillingMethods(validated_method_data);
+  ignore_total_ =
+      RuntimeEnabledFeatures::DigitalGoodsEnabled(GetExecutionContext()) &&
+      RequestingOnlyAppStoreBillingMethods(validated_method_data);
   ValidateAndConvertPaymentDetailsInit(details, options_, validated_details,
                                        shipping_option_, ignore_total_,
                                        *GetExecutionContext(), exception_state);

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -689,6 +689,8 @@
     },
     {
       name: "DigitalGoods",
+      origin_trial_feature_name: "DigitalGoods",
+      origin_trial_os: ["android"],
       status: "experimental",
     },
     {