NDK r22b released

[Haibo Huang]

NDK r22b is now available in the stable channel of the SDK manager (use ndkVersion "22.1.7171670" in your build.gradle) and for download from our website.

Includes fixes for the following issues:

• Issue 1377: Fix Clang backend crash in register scavenging.

• Issue 1388: Fixed LLVM's incorrect conversion to list files for long command lines on Windows.

• Issue 1391: Fixed missing symbols from libz.a.

• Issue 1427: Fixed Clang auto-detection for CMake 3.19 and older for Windows.