[Build/Android] remove gst pkg after download

Set version of gstreamer android release and remove it after extracting pkg.

Signed-off-by: Jaeyun Jung <jy1210.jung@samsung.com>

Author: jaeyun-jung

.github/actions/android-build/action.yml

@@ -30,10 +30,13 @@ runs:
         java-version: 17
     - name: Get gstreamer-android
       run: |
+        gst_android_ver=1.24.0
+        gst_android_pkg=gstreamer-1.0-android-universal-${gst_android_ver}.tar.xz
         mkdir -p ~/android/gst_root_android/
         pushd ~/android/gst_root_android/
-        wget https://gstreamer.freedesktop.org/data/pkg/android/1.24.0/gstreamer-1.0-android-universal-1.24.0.tar.xz
-        tar -xf gstreamer-1.0-android-universal-1.24.0.tar.xz
+        wget https://gstreamer.freedesktop.org/data/pkg/android/${gst_android_ver}/${gst_android_pkg}
+        tar -xf ${gst_android_pkg}
+        rm ${gst_android_pkg}
         popd
       shell: bash
     - name: Get nnstreamer