ARC++ PH: Rephrase the tooltip text

Rephrase of the UI tool tip text. Making it more clear for the user.

UI: https://screenshot.googleplex.com/5gkWMVmZn8zKDj4

Upstreaming-Plan: Will be merged to main once approved.
Bug: 265471993
Test: Manual
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:d8c1b2bdef1b38e1cec6335d3a63042acd479442)
Merged-In: I925aef7af63907e87a5295914cbb819c343fa168
Change-Id: I925aef7af63907e87a5295914cbb819c343fa168