Android) Use ALooper_pollOnce

[hsdk123]

Due to error when trying to build:

/Users/hkim809/Desktop/SoulEngineProject/Light.vn-core/_deps/magnum/09ec007dcdf254550026d6b8f1a7dfd74874e1e9/src/Magnum/Platform/AndroidApplication.cpp:672:24: error: 'ALooper_pollAll' is unavailable: obsoleted in Android 1 - ALooper_pollAll may ignore wakes. Use ALooper_pollOnce instead. See The API documentation for more information
  672 |         while((ident = ALooper_pollAll(
      |                        ^
/Users/hkim809/Library/Android/sdk/ndk/28.0.12916984/toolchains/llvm/prebuilt/darwin-x86_64/bin/../sysroot/usr/include/android/looper.h:234:5: note: 'ALooper_pollAll' has been explicitly marked unavailable here
  234 | int ALooper_pollAll(int timeoutMillis, int* outFd, int* outEvents, void** outData)
      |     ^
1 error generated.

[hsdk123]

@mosra were you able to look through this?

[mosra]

Not yet, sorry. I have a giant change related to image representation in this repository that I want to finish first. Hopefully that happens today or tomorrow, and then I can look.

[hsdk123]

@mosra have you been able to take a look through?
This is a blocker for raising the ndk version and keeps me stuck on an older version of c++.

[mosra]

Commited as 2219abd with some minor formatting changes. Sorry it took so long, I had too many changes happening at once and had to finish them all first. I'll try to merge #660 at least partially as soon as I have another chance.

[hsdk123]

No worries, thanks a bunch as always!