1. Using "h" and "m" instead of "hrs" and "min" 2. Refactor the string to CharSequence so it won't have TTS issue(i.e read "m" as "meter") 3. Update tests related to this part. Bug: 37201139 Test: RunSettingsRoboTests Change-Id: I9cadb511572b2d522d26ab337c171fa69da87475