26158 Fix composition when multiple platform views and layers are combined (platform-android, cla: yes, waiting for tree to go green)

26164 Let the framework toggle between single- and multi-entry histories (cla: yes, waiting for tree to go green, platform-web)

26167 Roll Fuchsia Linux SDK from CudXaX-jL… to RT1RbBM69… (cla: yes, waiting for tree to go green)

26168 Roll Skia from aecf8d517143 to df2dbad1a87d (9 revisions) (cla: yes, waiting for tree to go green)

26169 Roll Fuchsia Mac SDK from a6aB7cNgl… to 9-tG_VdU_… (cla: yes, waiting for tree to go green)