Unpin nttld/setup-ndk from v1.5.0 once upstream fix is released #425
Description
We pinned nttld/setup-ndk to v1.5.0 in the Android CI workflow because their v1.6.0 release broke NDK extraction (clang binaries missing from the toolchain).
Upstream issue: nttld/setup-ndk#576
Once that issue is resolved, update .github/workflows/android-build.yml to use @v1 again instead of @v1.5.0.
Related PR: #423