message: Search: shadow for Android default theme fix
diff: .Search--android.Search--default {
  padding: 8px;
  + box-shadow: 0 0 4px rgba(0, 0, 0, .08), 0 4px 4px rgba(0, 0, 0, .16);
  + position: relative;
  + z-index: 2;
  }
  .Search--android.Search--default .Search__container {
  