But where are these XML files?you don't need the android sdk.. get the apk manager 4.8 or 4.9 for simple xml editing.. decompile the apk, edit the xml, compile back up, open archive with 7zip and drag all the edited png's into the unsignedframework-res.apk... rename it to framework-res.apk and toss it in an update.zip... as far as the keyboard goes, in the system/app/ section is where contacts.apk, phone.apk,settings.apk, etc are all located and latinIME.apk is the keyboard...Are you sure the keyboard is on its own? I see buttons and letters in the framework.apkthe keyboard is on its own. you theme that by doing the same thing you do for framework-res.apk but just do it with LatinIME.apk
If you want to edit xmls, I have a guide already writted for that. I actually made it for people exactly like you. Read the intro to verify that.
Also I'm not going to use the SDK to edit xmls. I downloaded it once and couldn't figure out how to use it and it wouldn't let me delete it from my computer. So I need another method on how to edit XMLs.