use java 11

Author: kroikie

.github/workflows/android.yml

@@ -9,10 +9,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - name: set up JDK 1.8
+    - name: set up JDK 11
       uses: actions/setup-java@v1
       with:
-        java-version: 1.8
+        java-version: 11
     - name: Check Snippets
       run: python scripts/checksnippets.py
     - name: Install NDK