[Android] PopupTest in PublicTransit

Rewrite PopupTest in PublicTransit and also migrate from testing the
pop-up blocked infobar to the pop-up blocked message.

Many framework changes too.

Change-Id: I06c61490666b840775859084a9ef4e9dd19bc5f7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5356637


Owners-Override: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1277010}