Remove postApplyAnimation

        displayContent.getInputMonitor().updateInputWindowsLw(false /*force*/);

        mTransitionChangeFlags = 0;

        postApplyAnimation(visible, fromTransition);

        // Set client visibility if:

        // 1. The activity is becoming visible. This is usually no-op because assume that

        //    setVisibility(true) should have been called. Just in case if that was missed.

        // 2. The activity is becoming invisible and not RESUMED state (it is usually PAUSED unless

        //    the activity is transient-hide). If the state is RESUMED, setVisibility(false) will be

        //    called until activityStopped. This is to avoid crashing apps that assume its view root

        //    won't be invisible before the activity is paused.

        if (visible || mState != RESUMED) {

            setClientVisible(visible);

        }

        // Notify the visibility change outside of transition in case onTransitionFinish is not

        // called for updating snapshot states.

        if (!fromTransition) {

            mWmService.mSnapshotController.notifyAppVisibilityChanged(this, visible);

        }

    }

    void commitVisibility(boolean visible, boolean performLayout) {

        return mNeedsLetterboxedAnimation && isAnimating();

    }

    /**

     * Post process after applying an app transition animation.

     *

     * <p class="note"><strong>Note: </strong> This function must be called after the animations

     * have been applied and {@link #commitVisibility}.</p>

     *

     * @param visible {@code true} if this {@link ActivityRecord} has become visible, otherwise

     *                this has become invisible.

     * @param fromTransition {@code true} if this call is part of finishing a transition. This is

     *                       needed because the shell transition is no-longer active by the time

     *                       commitVisibility is called.

     */

    private void postApplyAnimation(boolean visible, boolean fromTransition) {

        final boolean usingShellTransitions = mTransitionController.isShellTransitionsEnabled();

        final boolean delayed = !usingShellTransitions && isAnimating(PARENTS | CHILDREN,

                ANIMATION_TYPE_APP_TRANSITION | ANIMATION_TYPE_WINDOW_ANIMATION);

        if (!delayed && !usingShellTransitions) {

            // We aren't delayed anything, but exiting windows rely on the animation finished

            // callback being called in case the ActivityRecord was pretending to be delayed,

            // which we might have done because we were in closing/opening apps list.

            onAnimationFinished(ANIMATION_TYPE_APP_TRANSITION, null /* AnimationAdapter */);

            if (visible) {

                // The token was made immediately visible, there will be no entrance animation.

                // We need to inform the client the enter animation was finished.

                mEnteringAnimation = true;

                mWmService.mActivityManagerAppTransitionNotifier.onAppTransitionFinishedLocked(

                        token);

            }

        }

        // If we're becoming visible, immediately change client visibility as well. there seem

        // to be some edge cases where we change our visibility but client visibility never gets

        // updated.

        // If we're becoming invisible, update the client visibility if we are not running an

        // animation and aren't in RESUMED state. Otherwise, we'll update client visibility in

        // onAnimationFinished or activityStopped.

        if (visible || (mState != RESUMED && (usingShellTransitions || !isAnimating(

                PARENTS, ANIMATION_TYPE_APP_TRANSITION)))) {

            setClientVisible(visible);

        }

        final DisplayContent displayContent = getDisplayContent();

        if (!displayContent.mClosingApps.contains(this)

                && !displayContent.mOpeningApps.contains(this)

                && !fromTransition) {

            // Take the screenshot before possibly hiding the WSA, otherwise the screenshot

            // will not be taken.

            mWmService.mSnapshotController.notifyAppVisibilityChanged(this, visible);

        }

        // If we are hidden but there is no delay needed we immediately

        // apply the Surface transaction so that the ActivityManager

        // can have some guarantee on the Surface state following

        // setting the visibility. This captures cases like dismissing

        // the docked or root pinned task where there is no app transition.

        //

        // In the case of a "Null" animation, there will be

        // no animation but there will still be a transition set.

        // We still need to delay hiding the surface such that it

        // can be synchronized with showing the next surface in the transition.

        if (!usingShellTransitions && !isVisible() && !delayed

                && !displayContent.mAppTransition.isTransitionSet()) {

            forAllWindows(win -> {

                win.mWinAnimator.hide(getPendingTransaction(), "immediately hidden");

            }, true);

            scheduleAnimation();

        }

    }

    /** Updates draw state and shows drawn windows. */

    void commitFinishDrawing(SurfaceControl.Transaction t) {

        boolean committed = false;

        // Simulate app plays closing transition to app2.

        app.mActivityRecord.commitVisibility(false, false);

        mDisplayContent.computeImeTarget(true /* updateImeTarget */);

        assertTrue(app.mActivityRecord.mLastImeShown);

        // Verify the IME insets is visible on app, but not for app2 during app task switching.