Use TestUtil.getPublicMethods instead of getDeclaredMethods

JaCoCo introduces private synthetic methods (even on interfaces) which
have to be skipped when checking that a 'forwarding' implementation does
forward everything. Instead we can use the existing `getPublicMethods()`
method which implicitly skips these (since they're private).

PiperOrigin-RevId: 519665752

library/common/src/test/java/com/google/android/exoplayer2/SimpleBasePlayerTest.java

@@ -44,6 +44,7 @@ import com.google.android.exoplayer2.metadata.Metadata;
 import com.google.android.exoplayer2.source.TrackGroup;
 import com.google.android.exoplayer2.source.ads.AdPlaybackState;
 import com.google.android.exoplayer2.testutil.FakeMetadataEntry;
+import com.google.android.exoplayer2.testutil.TestUtil;
 import com.google.android.exoplayer2.text.Cue;
 import com.google.android.exoplayer2.text.CueGroup;
 import com.google.android.exoplayer2.trackselection.TrackSelectionParameters;
@@ -1441,7 +1442,7 @@ public class SimpleBasePlayerTest {
                     .build()));
     verifyNoMoreInteractions(listener);
     // Assert that we actually called all listeners.
-    for (Method method : Player.Listener.class.getDeclaredMethods()) {
+    for (Method method : TestUtil.getPublicMethods(Player.Listener.class)) {
       if (method.getName().equals("onAudioSessionIdChanged")
           || method.getName().equals("onSkipSilenceEnabledChanged")) {
         // Skip listeners for ExoPlayer-specific states

library/core/src/test/java/com/google/android/exoplayer2/analytics/DefaultAnalyticsCollectorTest.java

@@ -201,12 +201,7 @@ public final class DefaultAnalyticsCollectorTest {
    */
   @Test
   public void defaultAnalyticsCollector_overridesAllPlayerListenerMethods() throws Exception {
-    for (Method method : Player.Listener.class.getDeclaredMethods()) {
-      if (method.isSynthetic()) {
-        // JaCoCo inserts synthetic methods. See "My code uses reflection. Why does it fail when I
-        // execute it with JaCoCo?": https://www.eclemma.org/jacoco/trunk/doc/faq.html
-        continue;
-      }
+    for (Method method : TestUtil.getPublicMethods(Player.Listener.class)) {
       assertThat(
               DefaultAnalyticsCollector.class
                   .getMethod(method.getName(), method.getParameterTypes())