Add resources hook

[yujincheng08]

A naive and ugly implementation, aiming to implement resources hook in non-root devices (by Xpatch framework).

Not tested very carefully, so some functions may not work properly or it may crash in some cases.

Most codes are copied and modified from EdXposed & dreamland.

Welcome any comment and modification.

[ghost]

Well, nice work, but those changes may lead crash on Android 11 devices.
Please create a new branch and take those changes to new branch, then make a new pull request and submit it.
Framework files changes on 11 and we should not use compileOnly but reflection.

[yujincheng08]

@lianglixin Many thx for ur suggestions. Actually I cannot submit a pull request to a new branch but the collaborators could merge my pr to a new branch, so there's nothing to do with me about the branch stuff.
And for Android P, I think the framework changes you mentioned are mainly affecting the hidden-api-stubs, which is not changed in Android P (as far as I refer to the changes on EdXposed). And for non-compileOnly part, I supposed I used reflection as much as possible.

In fact, I am not an expert in Android Development, so I am always hoping there could be someone helping me to perfect this PR.