[ CI ] modify android build test in action

This pr fixs the duplicated build in android build action.

**Self evaluation:**
1. Build test:	 [X]Passed [ ]Failed [ ]Skipped
2. Run test:	 [X]Passed [ ]Failed [ ]Skipped

Signed-off-by: jijoong.moon <[email protected]>

.github/workflows/android.yml

@@ -36,21 +36,12 @@ jobs:
         echo "::group::Run package_android.sh"
         ./tools/package_android.sh
         echo "::endgroup::"
-        echo "::group::Meson build"
-        meson build -Dplatform=android
-        ninja -C build
-        echo "::endgroup::"
-        echo "::group::NDK build"
-        pushd build/jni
-        ndk-build NDK_PROJECT_PATH=./ APP_BUILD_SCRIPT=./Android.mk NDK_APPLICATION_MK=./Application.mk
-        popd
-        echo "::endgroup::"
     - name: Install built binaries for application build
       if: env.rebuild == '1'
       run: |
         echo "Installing build bianries for application build"
         mkdir -p libs/arm64-v8a
-        cp -R build/jni/libs/arm64-v8a/* libs/arm64-v8a
+        cp -R builddir/android_build_result/lib/arm64-v8a/* libs/arm64-v8a
     - name: Android NNTrainer Application Build
       if: env.rebuild == '1'
       run: |