7746 Don’t call OnAnimatorNotifyIdle if a frame is scheduled (cla: yes)

7751 Create mipmaps for images when uploading them on the IO thread (cla: yes)

7753 allow specifying out directory root (cla: yes)

7755 Document GPUSurfaceGLDelegate methods and move it to its own file. (cla: yes)

7756 Add flutter config to macOS targets (cla: yes)

7758 Recommended implementation of combining characters implementation. (cla: yes)

7759 Throttle picture raster cache (cla: yes)

7762 Allow specifying the out directory prefix (cla: yes)

7764 Add x bit to some python scripts (cla: yes)

7765 Revert “Add mock capability to PerformanceOverlayLayer” (cla: yes)