Enable lottie capability

We're no longer blocked on using lottie, see crbug.com/1116501
I was able to confirm a lottie animation works.

Bug: 1158468
Change-Id: I05724d6f24630195e8eed0ec985edcc6792e9337
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2636848Reviewed-by: Justin DeWitt <dewittj@chromium.org>
Commit-Queue: Dan H <harringtond@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845404}

components/feed/core/v2/proto_util.cc

@@ -120,6 +120,7 @@ feedwire::Request CreateFeedQueryRequest(
   feedwire::FeedRequest& feed_request = *request.mutable_feed_request();
   feed_request.add_client_capability(feedwire::Capability::BASE_UI);
   feed_request.add_client_capability(feedwire::Capability::CARD_MENU);
+  feed_request.add_client_capability(feedwire::Capability::LOTTIE_ANIMATIONS);
   for (auto capability : GetFeedConfig().experimental_capabilities)
     feed_request.add_client_capability(capability);
   if (base::FeatureList::IsEnabled(kInterestFeedV2Hearts)) {

components/feed/core/v2/proto_util_unittest.cc

@@ -58,6 +58,7 @@ TEST(ProtoUtilTest, DefaultCapabilities) {
       request.client_capability(),
       testing::UnorderedElementsAre(
           feedwire::Capability::BASE_UI, feedwire::Capability::REQUEST_SCHEDULE,
+          feedwire::Capability::LOTTIE_ANIMATIONS,
           feedwire::Capability::OPEN_IN_TAB, feedwire::Capability::CARD_MENU,
           feedwire::Capability::DOWNLOAD_LINK,
           feedwire::Capability::INFINITE_FEED,
@@ -99,6 +100,7 @@ TEST(ProtoUtilTest, DisableCapabilitiesWithFinch) {
       request.client_capability(),
       testing::UnorderedElementsAre(
           feedwire::Capability::BASE_UI, feedwire::Capability::REQUEST_SCHEDULE,
+          feedwire::Capability::LOTTIE_ANIMATIONS,
           feedwire::Capability::OPEN_IN_TAB, feedwire::Capability::CARD_MENU,
           feedwire::Capability::DOWNLOAD_LINK,
           feedwire::Capability::DISMISS_COMMAND,