getWaterfallInsets
Returns the insets representing the curved areas of a waterfall display. A waterfall display has curved areas along the edges of the screen. Apps should be careful when showing UI and handling touch input in those insets because the curve may impair legibility and can frequently lead to unintended touch inputs.
Return
the insets for the curved areas of a waterfall display in pixels or
Insets.NONE if there are no curved areas or they don't overlap with the window.