3848 [google_sign_in] remove execute bit from a lot of files (cla: yes, p: google_sign_in, platform-ios, platform-android)

3850 [google_maps_flutter] Unpin iOS GoogleMaps pod dependency version (cla: yes, p: google_maps_flutter, platform-ios, last mile)

3851 [in_app_purchase] Implement registerPlatform method for iOS implementation (cla: yes, p: in_app_purchase, platform-ios)

3870 [in_app_purchase] iOS example using in_app_purchase_ios package (cla: yes, p: in_app_purchase, platform-ios)

3873 [image_picker] Image picker fix metadata (cla: yes, p: image_picker, platform-ios)