Add Arrows to Folder PageIndicatorDots for Accessibility Purposes.

Bug: 383974843
Test: Verified via go/web-hv that the hitbox sizes were correct. Measured the width and height within the folder for 1 through 7 pages, and everything looked great.Change title worked, and pressing on arrows to change page worked great.
Flag: com.android.launcher3.enable_launcher_visual_refresh

Change-Id: Ic095b2abe330544882467fb4803724e8d50a1798