fixup! Build pull request on CI

Author: hannesa2

.github/workflows/android-emulator.yml

@@ -8,7 +8,7 @@ jobs:
   build:
     runs-on: macOS-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
       - name: set up JDK 1.8
         uses: actions/setup-java@v1
         with: