Fix proguard ignores

Author: marcbaechinger

libraries/test_proguard/src/androidTest/java/androidx/media3/test/proguard/ExtractorModuleProguardTest.java

@@ -17,6 +17,7 @@
 
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 

libraries/test_proguard/src/androidTest/java/androidx/media3/test/proguard/UiModuleProguardTest.java

@@ -19,6 +19,7 @@
 import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
 
 import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;