build errors and support for android/amd64

I needed to use paddle on my project that I am testing on an emulator, so I needed it to be able to build for android/amd64

I used AI (gemini) to setup docker build environments and get v 2.14rc to build. along the way I found that there were build problems that also applied to arm builds as well. At this point I have two branches/PRs created, one with just the build fixes, and the other that has the build fixes plus the changes needed to make android/amd64 a working build.

Before I submit this, I wanted to verify that this is something that you would want

PR_X86_ANDROID.md PR_UPSTREAM_CLEANUP.md

https://github.com/davidelang/Paddle-Lite/tree/pr-upstream-cleanup https://github.com/davidelang/Paddle-Lite/tree/pr-x86-android-mobile-gap

I have been hammering on this version extensively over the last month (with both fixed and dynamic models) and am confident that it runs without problems on amd64 (emulator on a pc) and arm64 (pixel 6 phone)

do you want me to submit this as a PR (or two PRs)? do you want to pull from the repo links above? do you not want anything tainted by AI? what is the best next step?