Pin Android NDK setup action to a specific commit hash in Android macOS build workflow

Author: anhappdev

.github/workflows/android-build-test-macos.yml

@@ -62,7 +62,7 @@ jobs:
           flutter config --no-analytics && dart --disable-analytics
           dart pub global activate protoc_plugin ^21.1.2
       - name: Install Android NDK
-        uses: nttld/setup-ndk@v1
+        uses: nttld/setup-ndk@afb4c9964b521afb97c864b7d40b11e6911bd410 # v1.5.0
         with:
           ndk-version: r25c  # v25.2.9519653
           add-to-path: true