Merge "Fix LetterboxScrollProcessor correctly recycle event" into main

     */

    @Nullable

    public InputEvent processInputEventBeforeFinish(@NonNull InputEvent inputEvent) {

        return mGeneratedEventIds.remove(inputEvent.getId()) ? null : inputEvent;

        if (mGeneratedEventIds.remove(inputEvent.getId())) {

            inputEvent.recycleIfNeededAfterDispatch();

            return null;

        }

        return inputEvent;

    }

    @NonNull

import static org.junit.Assert.assertEquals;

import static org.junit.Assert.assertNotNull;

import static org.junit.Assert.assertNull;

import static org.mockito.Mockito.verify;

import static org.mockito.Mockito.when;

import android.content.Context;

import android.graphics.Rect;

import org.junit.Before;

import org.junit.Test;

import org.mockito.Mockito;

import java.util.ArrayList;

import java.util.List;

        // Ensure all processed events (that are not ignored) are offset over the app.

        assertXCoordinatesAdjustedToZero(scrollGestureEvents, processedEvents);

        // The first event is synthesized event. Ensure it is recycled in the processor.

        // Mockito cannot mock final class, the event is faked by returning the same ID.

        final InputEvent mockEvent = Mockito.mock(InputEvent.class);

        when(mockEvent.getId()).thenReturn(processedEvents.getFirst().getId());

        final InputEvent firstEventToBeFinished =

                mLetterboxScrollProcessor.processInputEventBeforeFinish(mockEvent);

        verify(mockEvent).recycleIfNeededAfterDispatch();

        assertNull(firstEventToBeFinished);

        // Except the first generated ACTION_DOWN event, ensure the following events should be

        // finished (these events should not be generated).

        assertMotionEventsShouldBeFinished(processedEvents.subList(1, processedEvents.size()));