19728 Fix Mac / iOS builds (cla: yes, platform-ios)

19739 Revert “Avoid a copy in EncodeImage (#19504)” (cla: yes)

19740 [fuchsia] Fix use-after-free due to raster cache (cla: yes)

19741 [null-safety] update web_sdk build rules to use package_config (cla: yes)

19743 Use option –no-sound-null-safety instead of –no-null-safety (cla: yes)

19744 Disable session_connection_unittests (cla: yes)

19745 [web][3/3] Handle surrogate during line break detection (cla: yes, platform-web)