Hover/Ripple effect update for window actions of Handle Menu windowing decoration:

- hover and click effects update to perfectly circular ripple
- center leftmost and rightmost effects to account for layout padding

Move buttons background drawable utils from HandleMenu.kt and viewholder/AppHeaderViewHolder.kt into common/ButtonBackgroundDrawableUtils.kt

Fix: 343727053
Test: manual – verify click ripple and hover state effects. Check new effects styling with dark/light modes.
Flag: com.android.window.flags.enable_desktop_windowing_mode
Change-Id: I428a96f8ec82e79f66ff4e13ab224483a1ffb0c0