PolyGerrit: Increase polygerrit test size

I'm seeing this

Executed 1 out of 2 tests: 2 tests pass.
There were tests whose specified size is too big.
Use the --test_verbose_timeout_warnings command line
option to see which ones these are.

Change-Id: I435b39abdbbde05bb81f2a678d0e3966743bfbda

polygerrit-ui/app/BUILD

@@ -80,7 +80,7 @@ genrule2(
 
 sh_test(
     name = "wct_test",
-    size = "large",
+    size = "enormous",
     srcs = ["wct_test.sh"],
     data = [
         "test/common-test-setup.html",
@@ -155,7 +155,7 @@ filegroup(
 
 sh_test(
     name = "embed_test",
-    size = "large",
+    size = "small",
     srcs = ["embed_test.sh"],
     data = [
         "embed/test.html",