[workflow] download ndk in sdk

.github/workflows/android.yml

@@ -19,13 +19,8 @@ jobs:
         packages: |
           build-tools;28.0.3
           platforms;android-29
+          ndk;19.2.5345600
         cache: true
-    - name: Setup Android NDK
-      run: |
-        export NDK_VERSION=r19c
-        curl -L https://dl.google.com/android/repository/android-ndk-${NDK_VERSION}-linux-x86_64.zip -O
-        unzip -q android-ndk-${NDK_VERSION}-linux-x86_64.zip
-        export ANDROID_NDK_HOME=`pwd`/android-ndk-${NDK_VERSION}
     - name: Build with Gradle
       run: ./gradlew --no-daemon assembleDebug
     - name: Upload artifacts