Update JDK and build brouter-routing-app (android)

.github/workflows/gradle.yml

@@ -16,11 +16,13 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up JDK 8
+    - name: Set up JDK 11
       uses: actions/setup-java@v2
       with:
-        java-version: '8'
+        java-version: '11'
         distribution: 'zulu'
         cache: gradle
+    - name: Create local.properties
+      run: touch local.properties
     - name: Build with Gradle
       run: ./gradlew build