Add mouse scrolling category title

Add a scrolling category title in mouse settings page to match
the new design.

Mock: go/al-peripherals-ux page 3.
Screenshot: go/screenshot-8mtcgnjkabci8qt

Bug: 383555305
Bug: 384795606
Test: Local DUT with aconfig flags enabled
Flag: com.android.hardware.input.mouse_scrolling_acceleration
Change-Id: I3aa734a9e588c41dc9d48c40d779544074654a0a