growth: Add UI action performer

Add a base class for UI action performers, such as show nudge action
performer.

The base class will handle basic methods to notify observers of the UI
actions, such as logging the impression, button press, and dismissal.

Bug: b:329671682
Test: Manually tested and Added new unittests
Change-Id: I0c38bd47cb6d6d17276f838f6353a0303f26c515
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5388885


Reviewed-by: Li Lin <llin@chromium.org>
Commit-Queue: Tao Wu <wutao@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1277235}