FIX: Workaround WebAPK server bug with images without sizes

FIX: Workaround WebAPK server bug with images without sizes

Google WebAPK server was returning 500 with any sized svgs, which is a spec violation.

Workaround for now setting a static size.

See https://bugs.chromium.org/p/chromium/issues/detail?id=1061911

diff --git a/app/controllers/metadata_controller.rb b/app/controllers/metadata_controller.rb
index 2ce4ada..7265ca1 100644
--- a/app/controllers/metadata_controller.rb
+++ b/app/controllers/metadata_controller.rb
@@ -62,7 +62,7 @@ class MetadataController < ApplicationController
           icons: [
             {
               src: "#{icon_url_base}/plus.svg",
-              sizes: "any",
+              sizes: "128x128",
               type: "image/svg+xml"
             }
           ]
@@ -74,7 +74,7 @@ class MetadataController < ApplicationController
           icons: [
             {
               src: "#{icon_url_base}/envelope.svg",
-              sizes: "any",
+              sizes: "128x128",
               type: "image/svg+xml"
             }
           ]
@@ -86,7 +86,7 @@ class MetadataController < ApplicationController
           icons: [
             {
               src: "#{icon_url_base}/bookmark.svg",
-              sizes: "any",
+              sizes: "128x128",
               type: "image/svg+xml"
             }
           ]
@@ -98,7 +98,7 @@ class MetadataController < ApplicationController
           icons: [
             {
               src: "#{icon_url_base}/signal.svg",
-              sizes: "any",
+              sizes: "128x128",
               type: "image/svg+xml"
             }
           ]

GitHub sha: bb7fca83