Navi: Update Google Apps + Email to match feedback from UX in person.

Minor tweaks to font face, font weight and spacing.

Bug: 874118
Change-Id: Ibe968ddcc5ac3ffc6462c0981286db695c5888f6
Reviewed-on: https://chromium-review.googlesource.com/c/1258606
Commit-Queue: Hector Carmona <hcarmona@chromium.org>
Reviewed-by: Scott Chen <scottchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596859}

chrome/browser/resources/welcome/onboarding_welcome/google_apps/nux_google_apps.html

@@ -39,6 +39,7 @@
       h1 {
         color: var(--cr-primary-text-color);
         font-size: 24px;
+        font-weight: 500;
         margin-bottom: 48px;
         opacity: .8;
         text-align: center;
@@ -50,10 +51,6 @@
         margin-bottom: 48px;
       }
 
-      paper-button {
-        font-size: 14px;
-      }
-
       .button-bar {
         display: flex;
         justify-content: space-between;

chrome/browser/resources/welcome/onboarding_welcome/shared/chooser_shared_css.html

@@ -21,12 +21,13 @@
         box-sizing: border-box;
         display: inline-flex;
         flex-direction: column;
-        height: 96px;
+        font-family: inherit;
+        height: 84px;
         justify-content: center;
         outline: 0;
         position: relative;
         vertical-align: bottom;
-        width: 120px;
+        width: 104px;
       }
 
       .option:not(:first-of-type) {
@@ -49,10 +50,10 @@
         background-position: center;
         background-repeat: no-repeat;
         background-size: contain;
-        height: 40px;
+        height: 32px;
         margin: 0;
         margin-bottom: 4px;
-        width: 40px;
+        width: 32px;
       }
 
       .option iron-icon {