Update push messaging tests to use both infobars and bubbles (w/ autoresponse)
- This CL updates the Permission Bubble Manager to autorespond for browser tests.
The test tells the Permission Bubble Manager which response is desired, and the
Permission Bubble Manager will execute that response immediately after Show().
- This CL applies the new responder to parameterized PushMessagingBrowsertests.
BUG=438758
Review URL: https://codereview.chromium.org/
1154943008
Cr-Commit-Position: refs/heads/master@{#333166}