Change the arrow drawable tint color to attr/colorAccent to ensure the color contrast.
Bug: 318611481
Flag: NA
Test: manually
Change-Id: Idd719a6714c46b91a7876b22c14dccec214b3b94
Create a dialog that could let users choose their preferred accessibility
shortcut.
This CL only contains dialog layout and its utility methods.
Related logic implementation will be added in next CL.
Bug: 142531156
Test: Maunal
Change-Id: I7bfccea96cc47dd213b4d828499c10b290e24330