ci: now using java 11

Author: arnaud-roland

.github/workflows/android.yml

@@ -9,7 +9,7 @@ jobs:
       - name: set up JDK 1.8
         uses: actions/setup-java@v1
         with:
-          java-version: 1.8
+          java-version: 11
       - name: Run CI
         run: make ci
       - name: Upload artifact