Replace hard coded UUID in OfflineLicenseHelper with a parameter

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=176102179

library/core/src/androidTest/java/com/google/android/exoplayer2/drm/OfflineLicenseHelperTest.java

@@ -23,7 +23,6 @@
 import android.util.Pair;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.drm.DrmInitData.SchemeData;
-import com.google.android.exoplayer2.upstream.HttpDataSource;
 import java.util.HashMap;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
@@ -34,15 +33,15 @@
 public class OfflineLicenseHelperTest extends InstrumentationTestCase {
 
   private OfflineLicenseHelper<?> offlineLicenseHelper;
-  @Mock private HttpDataSource httpDataSource;
   @Mock private MediaDrmCallback mediaDrmCallback;
   @Mock private ExoMediaDrm<ExoMediaCrypto> mediaDrm;
 
   @Override
   protected void setUp() throws Exception {
     setUpMockito(this);
     when(mediaDrm.openSession()).thenReturn(new byte[] {1, 2, 3});
-    offlineLicenseHelper = new OfflineLicenseHelper<>(mediaDrm, mediaDrmCallback, null);
+    offlineLicenseHelper = new OfflineLicenseHelper<>(C.WIDEVINE_UUID, mediaDrm, mediaDrmCallback,
+        null);
   }
 
   @Override

library/core/src/main/java/com/google/android/exoplayer2/drm/OfflineLicenseHelper.java

@@ -27,8 +27,8 @@
 import com.google.android.exoplayer2.upstream.HttpDataSource;
 import com.google.android.exoplayer2.upstream.HttpDataSource.Factory;
 import com.google.android.exoplayer2.util.Assertions;
-import java.io.IOException;
 import java.util.HashMap;
+import java.util.UUID;
 
 /**
  * Helper class to download, renew and release offline licenses.
@@ -96,22 +96,24 @@ public static OfflineLicenseHelper<FrameworkMediaCrypto> newWidevineInstance(
       String defaultLicenseUrl, boolean forceDefaultLicenseUrl, Factory httpDataSourceFactory,
       HashMap<String, String> optionalKeyRequestParameters)
       throws UnsupportedDrmException {
-    return new OfflineLicenseHelper<>(FrameworkMediaDrm.newInstance(C.WIDEVINE_UUID),
+    return new OfflineLicenseHelper<>(C.WIDEVINE_UUID,
+        FrameworkMediaDrm.newInstance(C.WIDEVINE_UUID),
         new HttpMediaDrmCallback(defaultLicenseUrl, forceDefaultLicenseUrl, httpDataSourceFactory),
         optionalKeyRequestParameters);
   }
 
   /**
    * Constructs an instance. Call {@link #release()} when the instance is no longer required.
    *
+   * @param uuid The UUID of the drm scheme.
    * @param mediaDrm An underlying {@link ExoMediaDrm} for use by the manager.
    * @param callback Performs key and provisioning requests.
    * @param optionalKeyRequestParameters An optional map of parameters to pass as the last argument
    *     to {@link MediaDrm#getKeyRequest(byte[], byte[], String, int, HashMap)}. May be null.
    * @see DefaultDrmSessionManager#DefaultDrmSessionManager(java.util.UUID, ExoMediaDrm,
    *     MediaDrmCallback, HashMap, Handler, EventListener)
    */
-  public OfflineLicenseHelper(ExoMediaDrm<T> mediaDrm, MediaDrmCallback callback,
+  public OfflineLicenseHelper(UUID uuid, ExoMediaDrm<T> mediaDrm, MediaDrmCallback callback,
       HashMap<String, String> optionalKeyRequestParameters) {
     handlerThread = new HandlerThread("OfflineLicenseHelper");
     handlerThread.start();
@@ -137,7 +139,7 @@ public void onDrmKeysRemoved() {
         conditionVariable.open();
       }
     };
-    drmSessionManager = new DefaultDrmSessionManager<>(C.WIDEVINE_UUID, mediaDrm, callback,
+    drmSessionManager = new DefaultDrmSessionManager<>(uuid, mediaDrm, callback,
         optionalKeyRequestParameters, new Handler(handlerThread.getLooper()), eventListener);
   }
 
@@ -174,12 +176,9 @@ public synchronized void setPropertyString(String key, String value) {
    *
    * @param drmInitData The {@link DrmInitData} for the content whose license is to be downloaded.
    * @return The key set id for the downloaded license.
-   * @throws IOException If an error occurs reading data from the stream.
-   * @throws InterruptedException If the thread has been interrupted.
    * @throws DrmSessionException Thrown when a DRM session error occurs.
    */
-  public synchronized byte[] downloadLicense(DrmInitData drmInitData) throws IOException,
-      InterruptedException, DrmSessionException {
+  public synchronized byte[] downloadLicense(DrmInitData drmInitData) throws DrmSessionException {
     Assertions.checkArgument(drmInitData != null);
     return blockingKeyRequest(DefaultDrmSessionManager.MODE_DOWNLOAD, null, drmInitData);
   }