Brings in new cmake 2.23.1 and Android NDK23c which fixes an issue with the binary size and perf of libmonosgen-2.0.so

In NDK23b they decided to no longer pass -O2 compiler optimization flag (for arm64, armv7 used -Oz) as part of the Android toolchain but delegate to upstream CMake behavior: https://github.com/android/ndk/wiki/Changelog-r23 and https://github.com/android/ndk/issues/1536

CMake defaults to -O3 for Release builds but unfortunately this causes quite a noticable binary size increase and perf regression.

The Xamarin Android team measured startup time on an average of 10 runs of `dotnet new maui` on a Pixel 5:
```
-O3: 893.7ms
-O2: 600.2ms
-Oz: 649.1ms
```

We now explicitly pass in -O2 for Android builds.

Fixes https://github.com/dotnet/runtime/issues/68330