Apply adaptive density to install button

Install button recently added here[1]

[1]: https://chromium-review.googlesource.com/c/chromium/src/+/6735615/23/chrome/browser/ui/android/omnibox/java/res/layout/url_action_container.xml

Bug: 433263948
Change-Id: Idc08b46b5e7631be76168cc8ef6bf17693f13bd1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6943715
Commit-Queue: Zhe Li <zheliooo@google.com>
Auto-Submit: Zhe Li <zheliooo@google.com>
Commit-Queue: Sirisha Kavuluru <skavuluru@google.com>
Reviewed-by: Sirisha Kavuluru <skavuluru@google.com>
Cr-Commit-Position: refs/heads/main@{#1515107}