Set path to sdk manager

Author: ghale

.github/workflows/ci-check.yml

@@ -24,7 +24,7 @@ jobs:
 
     # Sets up the NDK required by AGP 3.6.x
     - name: Setup NDK
-      run: sdkmanager 'ndk;20.0.5594570'
+      run: $ANDROID_HOME/tools/bin/sdkmanager 'ndk;20.0.5594570'
 
     # Use Java 8
     - uses: actions/setup-java@v1