Fix button should not be all caps

The button style comes from <style name="TextAppearance.Material.Button"> and textAllCaps be set "true". That causes the text in ALL CAPS problem.
To provide message button in normal cap styles for current theme to fix this issue.

Change-Id: I838c8c1620d630f7edb332061cbe77b508118984
Fix: 123734206
Test: Manually test
4 files changed