Which Unreal engine version are you using by the way?
You can try renaming the files you getting errors.
For example for : [crunch]9-patch image ~\Android\APK\JavaLibs\Facebook-4.18.0\res\drawable-mdpi-v4\abc_btn_switch_to_on_mtrl_00012.9.png malformed.
Unzip the Facebook-4.18.aar file, find the file abc_btn_switch_to_on_mtrl_00012.9 rename it to abc_btn_switch_to_on_mtrl_00012.png(or maybe abc_btn_switch_to_on_mtrl_00012) or save it again with an image editor, then add to a zip file with .aar extension all the folders inside Facebook-4.18 and then replace the original Facebook-4.18.aar file in the plugin directory.
For a test do this for the first 1-2 files you are getting this error. If you see you are not getting it anymore then do it for the rest. And then from there see if you get any other kind of errors or you can package successfully the game.
AAR files are giving me lot of trouble but i don’t remember to have seen this one.