Ignore PlaybackTest on CI

.github/workflows/android-emulator.yml

@@ -21,7 +21,7 @@ jobs:
         api-level: 28
         headless: true
         disable-animations: true
-        script: ./gradlew connectedPlayDebugAndroidTest
+        script: ./gradlew connectedPlayDebugAndroidTest -Pandroid.testInstrumentationRunnerArguments.notAnnotation=de.test.antennapod.IgnoreOnCi
     - uses: actions/upload-artifact@v1
       if: failure()
       with:

app/src/androidTest/java/de/test/antennapod/IgnoreOnCi.java

@@ -0,0 +1,15 @@
+package de.test.antennapod;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Tests with this annotation are ignored on CI. This could be reasonable
+ * if the performance of the CI server is not enough to provide a reliable result.
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+public @interface IgnoreOnCi {
+}

app/src/androidTest/java/de/test/antennapod/playback/PlaybackTest.java

@@ -21,6 +21,7 @@ import de.danoeh.antennapod.core.storage.DBWriter;
 import de.danoeh.antennapod.core.util.IntentUtils;
 import de.danoeh.antennapod.core.util.LongList;
 import de.test.antennapod.EspressoTestUtils;
+import de.test.antennapod.IgnoreOnCi;
 import de.test.antennapod.ui.UITestUtils;
 import org.awaitility.Awaitility;
 import org.hamcrest.Matcher;
@@ -60,6 +61,7 @@ import static org.junit.Assert.assertTrue;
  * Test cases for starting and ending playback from the MainActivity and AudioPlayerActivity.
  */
 @LargeTest
+@IgnoreOnCi
 @RunWith(Parameterized.class)
 public class PlaybackTest {
     @Rule