doc: Fixing Javadoc formatting problems.

No code changes, just fixing typos in the doc comments.

Doc is staged to:

http://go/dac-stage/reference/android/service/autofill/AutofillService.html
http://go/dac-stage/reference/android/service/autofill/FillRequest.html

Test: make ds-docs
Bug: 70812346
Merged-In: Ia76121c60197275c6be1717c8003fe1c4baf5f97
Change-Id: I5ee04bb96234441c5740665540b5e803fcf9710f

core/java/android/service/autofill/AutofillService.java

@@ -438,6 +438,7 @@ import com.android.internal.os.SomeArgs;
  *  AutofillValue password = passwordNode.getAutofillValue().getTextValue().toString();
  *
  *  save(username, password);
+ *  </pre>
  *
  * <a name="Privacy"></a>
  * <h3>Privacy</h3>

core/java/android/service/autofill/FillRequest.java

@@ -129,7 +129,7 @@ public final class FillRequest implements Parcelable {
     /**
      * Gets the extra client state returned from the last {@link
      * AutofillService#onFillRequest(FillRequest, CancellationSignal, FillCallback)}
-     * fill request}.
+     * fill request.
      *
      * @return The client state.
      */