Move E2E DASH test into DASH package

PiperOrigin-RevId: 384912341

library/dash/src/test/java/com/google/android/exoplayer2/e2etest/DashPlaybackTest.java → library/dash/src/test/java/com/google/android/exoplayer2/source/dash/e2etest/DashPlaybackTest.java

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * See the License for the specific language governing permissions and
  * limitations under the License.
  * limitations under the License.
  */
  */
-package com.google.android.exoplayer2.e2etest;
+package com.google.android.exoplayer2.source.dash.e2etest;
 
 
 import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
 import static com.google.android.exoplayer2.util.Assertions.checkNotNull;