Create HandlerThread for TaskFragmentAnimationRunner am: 7a696c99

package androidx.window.extensions.embedding;

import static android.os.Process.THREAD_PRIORITY_DISPLAY;

import static android.view.RemoteAnimationTarget.MODE_CLOSING;

import static android.view.WindowManager.TRANSIT_OLD_ACTIVITY_CLOSE;

import static android.view.WindowManager.TRANSIT_OLD_ACTIVITY_OPEN;

import android.animation.ValueAnimator;

import android.graphics.Rect;

import android.os.Handler;

import android.os.Looper;

import android.os.HandlerThread;

import android.os.RemoteException;

import android.util.Log;

import android.view.IRemoteAnimationFinishedCallback;

class TaskFragmentAnimationRunner extends IRemoteAnimationRunner.Stub {

    private static final String TAG = "TaskFragAnimationRunner";

    private final Handler mHandler = new Handler(Looper.myLooper());

    private final Handler mHandler;

    private final TaskFragmentAnimationSpec mAnimationSpec;

    TaskFragmentAnimationRunner() {

        HandlerThread animationThread = new HandlerThread(

                "androidx.window.extensions.embedding", THREAD_PRIORITY_DISPLAY);

        animationThread.start();

        mHandler = animationThread.getThreadHandler();

        mAnimationSpec = new TaskFragmentAnimationSpec(mHandler);

    }