7002 Support querying display refresh rate in engine (cla: yes)

7012 Merge latest from master => 21008 staging branch (cla: yes)

7024 Roll Skia to 57d29eaf2ed7518983d9e91fd5219f4cfc181f88 (cla: yes)

7031 Pass operator_new_alignment value through gn script into GN args. (cla: yes)

7048 Only overflow the cache for one required frame (cla: yes)

7068  SK_SUPPORT_LEGACY_TEXTENCODINGENUM (cla: yes)

7087 Wire up support for external OpenGL textures for the embedder. (cla: yes)