Fix glanceable info view overlapping.

Bug: none.
Test: manually.
Change-Id: I4b743fcf79dcdbe61faad32df3c7cb4de53a3d68
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2238595Reviewed-by: Tao Wu <wutao@chromium.org>
Commit-Queue: Meilin Wang <meilinw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#779620}

ash/ambient/ui/ambient_container_view.cc

@@ -28,7 +28,7 @@ namespace {
 
 // Appearance.
 constexpr int kHorizontalMarginDip = 16;
-constexpr int kVerticalMarginDip = 16;
+constexpr int kVerticalMarginDip = 64;
 constexpr int kAssistantContainerViewPreferredHeightDip = 128;
 
 // TODO(meilinw): temporary values for dev purpose, need to be updated with the