Fix Android native build

[subham8907]

Summary

• use the Android NDK compiler for Android native targets instead of Zig's Android target
• add -fPIC for shared library builds
• include the generated aarch64-linux-android-tree-sitter.so resource

Why

The current aarch64-linux-android build fails through Zig 0.11 because the Android libc/sysroot is not resolved correctly, producing missing standard C type and header errors such as size_t, NULL, and inttypes.h.

Routing Android builds through the installed Android NDK matches normal JNI build behavior and resolves the sysroot/header issue.

Validation

ANDROID_HOME=/Users/subhammahesh/Library/Android/sdk ./gradlew :tree-sitter:buildNative -PtreeSitterTargets=aarch64-linux-android --stacktrace

Result:

BUILD SUCCESSFUL

The generated artifact was verified as an ARM64 Android-compatible shared object:

tree-sitter/src/main/resources/lib/aarch64-linux-android-tree-sitter.so: ELF 64-bit LSB shared object, ARM aarch64

@bonede @DavidBakerEffendi