message: Update navigation bar color on android
diff: <link rel="icon" type="image/png" href="/favicon-16x16.png" sizes="16x16" />
  <link rel="manifest" href="/manifest-webapp-6-2018.json" />
  <link rel="mask-icon" href="/safari-pinned-tab.svg" color="#434444" />
  - <meta name="theme-color" content="#404141" />
  + <meta name="theme-color" content="black" />
  <meta name="mobile-web-app-capable" content="yes" />
  <meta name="apple-mobile-web-app-capable" content="yes" />
  <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
  