Corrects the height calculation of the handle menu

Height calculation did not consider the 1dp of bottom padding.

Also removes the extra 1dp added to the view's LayoutParam's height and
width. Padding is added directly to view so that the view's elevation is
not clipped.

Bug: 377619535
Test: Open menu on phone and tablet
Flag: com.android.window.flags.enable_desktop_windowing_mode
Change-Id: I0800cdeaacda70296c44c086cb04b398fde735c9