autoclick: Autoclick type panel - Adjust panel spacing.

Added 8dp spacing between buttons when the Auto-click Type panel is
expanded, and removed spacing when collapsed. The spacing updates
dynamically based on the panel state.

Meanwhile, Updated padding within the type panel to match the spec.

expanded_left:http://screen/Bj2swEVotPaG8ak
expanded_right: http://screen/7DsNzCLTzHwzA7y
collapsed: http://screen/BoGKynXjPcgFL3P

Bug: b/416042590
Test: atest
Flag: com.android.server.accessibility.enable_autoclick_indicator
Change-Id: I1aca90653a8880e731112cc649707349fac6014e