Extend the SeekBar left/start padding to avoid touch region too small

old padding: https://screenshot.googleplex.com/3t57cJfM2HCd6bc
new padding: https://screenshot.googleplex.com/5yuzj5oQvvKvY7W

Bug: 202295741
Test: make SettingsRoboTests
Change-Id: Ia4453261c22919e325a971237efc79b4887362ec
1 file changed