[Nearby] Prevent cr-lottie from blocking links.

The cr-lottie element was blocking the overlapping "learn more" links
because the "position" attribute was pushing it to the front of the
stack. Using "pointer-events: none" prevents it from interfering.

Fixed: 1138445
Change-Id: I6eed177fd6ce47a598a68594233775d6a2a195cc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2572700Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Michael Hansen <hansenmichael@google.com>
Cr-Commit-Position: refs/heads/master@{#833902}

chrome/browser/resources/nearby_share/nearby_discovery_page.html

@@ -108,6 +108,7 @@
   cr-lottie {
     bottom: 0;
     height: 100px;
+    pointer-events: none;
     position: absolute;
   }
 

chrome/browser/resources/settings/chromeos/nearby_share_page/nearby_share_high_visibility_page.html

@@ -46,6 +46,7 @@
       cr-lottie {
         bottom: 0;
         height: 100px;
+        pointer-events: none;
         position: absolute;
       }
     </style>