Update user consent dialog for device log access

Consent dialog string update by breaking the sentence with punctuation.

This codebase is the continuity of the implementation ag/16618162 to
obtain user consent.

Bug: 193708292
Test: NA
Ignore-AOSP-First: pending fix for logcat privacy issue
Change-Id: Iccf2ea4a978db10d97be9fb7b8f10a7cf2f27134