Merge "Call listener when media button session is destroyed"

         * has specified the target.

         * <p>

         * The session token can be {@link null} if the media button session is unset. In that case,

         * framework would dispatch to the last sessions's media button receiver. If the media

         * button receive isn't set as well, then it

         * packageName will return the package name of the last session's media button receiver, or

         * an empty string if the last session didn't set a media button receiver.

         *

         * @param packageName The package name who would receive the media key event. Can be empty.

         * @param packageName The package name of the component that will receive the media key

         *                    event. Can be empty.

         * @param sessionToken The media session's token. Can be {@code null}.

         */

        void onMediaKeyEventSessionChanged(@NonNull String packageName,

                } else if (mCurrentFullUserRecord.mLastMediaButtonReceiverHolder != null) {

                    String packageName = mLastMediaButtonReceiverHolder.getPackageName();

                    callback.onMediaKeyEventSessionChanged(packageName, null);

                } else {

                    callback.onMediaKeyEventSessionChanged("", null);

                }

            } catch (RemoteException e) {

                Log.w(TAG, "Failed to pushAddressedPlayerChangedLocked", e);