Merge changes I7ae7dac9,Ie142cac2 into udc-qpr-dev

package com.android.systemui.compose

import android.view.View

import androidx.lifecycle.findViewTreeLifecycleOwner

import androidx.lifecycle.setViewTreeLifecycleOwner

import androidx.lifecycle.Lifecycle

import androidx.lifecycle.ViewTreeLifecycleOwner

import androidx.savedstate.SavedStateRegistry

import androidx.savedstate.SavedStateRegistryController

import androidx.savedstate.SavedStateRegistryOwner

import com.android.compose.animation.ViewTreeSavedStateRegistryOwner

internal object ComposeInitializerImpl : ComposeInitializer {

    override fun onAttachedToWindow(root: View) {

        if (ViewTreeLifecycleOwner.get(root) != null) {

        if (root.findViewTreeLifecycleOwner() != null) {

            error("root $root already has a LifecycleOwner")

        }

                override val savedStateRegistry = savedStateRegistryController.savedStateRegistry

                override fun getLifecycle(): Lifecycle = lifecycleOwner.lifecycle

                override val lifecycle: Lifecycle

                    get() = lifecycleOwner.lifecycle

            }

        // We must call [ViewLifecycleOwner.onCreate] after creating the [SavedStateRegistryOwner]

        // Set the owners on the root. They will be reused by any ComposeView inside the root

        // hierarchy.

        ViewTreeLifecycleOwner.set(root, lifecycleOwner)

        root.setViewTreeLifecycleOwner(lifecycleOwner)

        ViewTreeSavedStateRegistryOwner.set(root, savedStateRegistryOwner)

    }

    override fun onDetachedFromWindow(root: View) {

        (ViewTreeLifecycleOwner.get(root) as ViewLifecycleOwner).onDestroy()

        ViewTreeLifecycleOwner.set(root, null)

        (root.findViewTreeLifecycleOwner() as ViewLifecycleOwner).onDestroy()

        root.setViewTreeLifecycleOwner(null)

        ViewTreeSavedStateRegistryOwner.set(root, null)

    }

}