Don't wrap FileDataSourceException in FileDataSourceException.

Instead just forward the existing exception.

PiperOrigin-RevId: 373145328

library/core/src/main/java/com/google/android/exoplayer2/upstream/FileDataSource.java

@@ -92,6 +92,8 @@ public final class FileDataSource extends BaseDataSource {
       if (bytesRemaining < 0) {
         throw new DataSourceException(DataSourceException.POSITION_OUT_OF_RANGE);
       }
+    } catch (FileDataSourceException e) {
+      throw e;
     } catch (IOException e) {
       throw new FileDataSourceException(e);
     }