7845 Add fml::FileExists implementation for Windows (cla: yes)

7846 Update buildroot to 7f64ff4928e to unblock Mac builds. (cla: yes)

7849 Revert “Android embedding refactor pr3 add remaining systemchannels (… (cla: yes)

7853 Revert “Support for binary decompression of dynamic patches. (#7777)” (cla: yes)

7862 Reland “Lower the threshold to raster cache pictures (#7687)” (cla: yes)

7863 Reland PerformanceOverlayLayer golden test (cla: yes)

7874 Android embedding refactor pr3 add remaining systemchannels (cla: yes)

7875 Fix caret being at left edge when newline pressed on centered text (cla: yes)