13697 Moves pointer event sanitizing to engine.

13708 Ensure that the device pixel ratio is taken into account with window metrics in physical pixels.

13710 Fix picture raster cache throttling

13711 Imagefilter wrapper object

13719 Fix NPE in splash screen lookup

13727 Add line boundary information to LineMetrics.

13728 Prefer SchedulerBinding.addTimingsCallback

13731 Expose the platform view mutator stack to custom compositors.

13735 Cleanup obsolete –strong option of front-end server

13736 libtxt: pass an RTL bool flag instead of a bidiFlags enum to measureText