20528e2550
Fixes https://github.com/flutter/flutter/issues/157108 Right now the DL is always growing by a minimum 4096 bytes at a time. On applications with large display lists, this can lead to hundreds of reallocations as the display list is build, as long as each draw op is small. For example, the framework benchmark long picture scrolling draws many lines, each of which is a pretty small op. Update the code so that we grow by doubling, with a minimum increment of ~16K