Reorder DataSourceException constructors and accept nullable parameters

This CL doesn't introduce functional changes.

PiperOrigin-RevId: 387613057

library/common/src/main/java/com/google/android/exoplayer2/upstream/DataSourceException.java

@@ -70,26 +70,24 @@ public class DataSourceException extends IOException {
   /**
    * Constructs a DataSourceException.
    *
-   * @param message The error message.
    * @param cause The error cause.
    * @param reason Reason of the error, should be one of the {@code ERROR_CODE_IO_*} in {@link
    *     PlaybackException.ErrorCode}.
    */
-  public DataSourceException(
-      String message, @Nullable Throwable cause, @PlaybackException.ErrorCode int reason) {
-    super(message, cause);
+  public DataSourceException(@Nullable Throwable cause, @PlaybackException.ErrorCode int reason) {
+    super(cause);
     this.reason = reason;
   }
 
   /**
    * Constructs a DataSourceException.
    *
-   * @param cause The error cause.
+   * @param message The error message.
    * @param reason Reason of the error, should be one of the {@code ERROR_CODE_IO_*} in {@link
    *     PlaybackException.ErrorCode}.
    */
-  public DataSourceException(Throwable cause, @PlaybackException.ErrorCode int reason) {
-    super(cause);
+  public DataSourceException(@Nullable String message, @PlaybackException.ErrorCode int reason) {
+    super(message);
     this.reason = reason;
   }
 
@@ -97,11 +95,15 @@ public class DataSourceException extends IOException {
    * Constructs a DataSourceException.
    *
    * @param message The error message.
+   * @param cause The error cause.
    * @param reason Reason of the error, should be one of the {@code ERROR_CODE_IO_*} in {@link
    *     PlaybackException.ErrorCode}.
    */
-  public DataSourceException(String message, @PlaybackException.ErrorCode int reason) {
-    super(message);
+  public DataSourceException(
+      @Nullable String message,
+      @Nullable Throwable cause,
+      @PlaybackException.ErrorCode int reason) {
+    super(message, cause);
     this.reason = reason;
   }
 }