zlib: compile Android CPU feature implementation

[luoqianlin]

Fix the Android zlib build by compiling the Android NDK CPU feature
implementation as part of the zlib target.

On Android, zlib/cpu_features.c calls android_getCpuFeatures(). The
function is implemented by the NDK source
sources/android/cpufeatures/cpu-features.c, but listing only zlib's local
sources leaves that implementation out of the link.

The GYP target now builds a small checked-in wrapper that includes that source
through the configured Android NDK include path. This keeps the generated
source and object paths relative to the Node.js checkout, which is required by
the Make and Ninja GYP generators. No machine-specific absolute path is
committed.

NDK r29 with Android API 30 and arm64 is the current validation baseline.

Refs: #65771

Validation:

• git diff --check
• Android arm64/API 30 GYP generation includes the checked-in wrapper and the
  configured NDK CPU feature include path.
• Android arm64/API 30 build links without an undefined
  android_getCpuFeatures symbol.

[nodejs-github-bot]

Review requested:

• @nodejs/gyp
• @nodejs/security-wg