Move asssets from smoothstreaming to testdata module

PiperOrigin-RevId: 293774012

library/smoothstreaming/build.gradle

@@ -33,6 +33,8 @@ android {
         }
     }
 
+    sourceSets.test.assets.srcDir '../../testdata/src/test/assets/'
+
     testOptions.unitTests.includeAndroidResources = true
 }
 

library/smoothstreaming/src/test/java/com/google/android/exoplayer2/source/smoothstreaming/manifest/SsManifestParserTest.java

@@ -27,8 +27,8 @@ import org.junit.runner.RunWith;
 @RunWith(AndroidJUnit4.class)
 public final class SsManifestParserTest {
 
-  private static final String SAMPLE_ISMC_1 = "sample_ismc_1";
-  private static final String SAMPLE_ISMC_2 = "sample_ismc_2";
+  private static final String SAMPLE_ISMC_1 = "smooth-streaming/sample_ismc_1";
+  private static final String SAMPLE_ISMC_2 = "smooth-streaming/sample_ismc_2";
 
   /** Simple test to ensure the sample manifests parse without any exceptions being thrown. */
   @Test