Refactor: Update the way tintAmount is propagated to TTV

- Propagate the tintAmount using the Views instead of using a Flow.

This was done to minimize the usage of Flows to propagate animations
and progress through Views. It should improve the overall performance
of UI updates

Some stats about the number of collections:
- Entering Overview: ~4 collections
- Displaying Scrim: ~32 collections
- Hiding Scrim: ~35 collections
- With 4 apps on screen: ~140 collections

Bug: 390581380
Doc: go/launcher-overview-unified-taskviewmodel
Flag: com.android.launcher3.enable_refactor_task_thumbnail
Test: OverviewImageTest
Test: TaskViewModelTest
Change-Id: Ice68edef12c7e3b2a26107b0fc6e62578de241b4

quickstep/src/com/android/quickstep/recents/ui/viewmodel/TaskViewModel.kt

@@ -68,8 +68,6 @@ class TaskViewModel(
             )
         }
 
-    val tintAmount: Flow<Float> = recentsViewData.tintAmount
-
     val state: Flow<TaskTileUiState> =
         combine(taskData, isLiveTile) { tasks, isLiveTile -> mapToTaskTile(tasks, isLiveTile) }
             .distinctUntilChanged()

quickstep/src/com/android/quickstep/recents/viewmodel/RecentsViewData.kt

@@ -27,9 +27,6 @@ class RecentsViewData {
     // The settled set of visible taskIds that is updated after RecentsView scroll settles.
     val settledFullyVisibleTaskIds = MutableStateFlow(emptySet<Int>())
 
-    // Color tint on foreground scrim
-    val tintAmount = MutableStateFlow(0f)
-
     val thumbnailSplashProgress = MutableStateFlow(0f)
 
     // A list of taskIds that are associated with a RecentsAnimationController. */

quickstep/src/com/android/quickstep/recents/viewmodel/RecentsViewModel.kt

@@ -42,10 +42,6 @@ class RecentsViewModel(
         recentsViewData.overlayEnabled.value = isOverlayEnabled
     }
 
-    fun setTintAmount(tintAmount: Float) {
-        recentsViewData.tintAmount.value = tintAmount
-    }
-
     fun updateThumbnailSplashProgress(taskThumbnailSplashAlpha: Float) {
         recentsViewData.thumbnailSplashProgress.value = taskThumbnailSplashAlpha
     }

quickstep/src/com/android/quickstep/views/RecentsView.java

@@ -241,8 +241,8 @@ import com.android.wm.shell.shared.desktopmode.DesktopModeTransitionSource;
 
 import kotlin.Unit;
 import kotlin.collections.CollectionsKt;
-
 import kotlin.jvm.functions.Function0;
+
 import kotlinx.coroutines.CoroutineScope;
 
 import java.util.ArrayList;
@@ -6567,10 +6567,6 @@ public abstract class RecentsView<
     private void setColorTint(float tintAmount) {
         mColorTint = tintAmount;
 
-        if (enableRefactorTaskThumbnail()) {
-            mRecentsViewModel.setTintAmount(tintAmount);
-        }
-
         for (TaskView taskView : getTaskViews()) {
             taskView.setColorTint(mColorTint, mTintingColor);
         }

quickstep/src/com/android/quickstep/views/TaskView.kt

@@ -33,6 +33,7 @@ import android.util.Log
 import android.view.Display
 import android.view.MotionEvent
 import android.view.View
+import android.view.View.OnClickListener
 import android.view.ViewGroup
 import android.view.ViewStub
 import android.view.accessibility.AccessibilityNodeInfo
@@ -98,8 +99,6 @@ import kotlinx.coroutines.Job
 import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.cancel
 import kotlinx.coroutines.flow.collectLatest
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
 import kotlinx.coroutines.launch
 
 /** A task in the Recents view. */
@@ -742,18 +741,11 @@ constructor(
             // The TaskView lifecycle is starts the ViewModel during onBind, and cleans it in
             // onRecycle. So it should be initialized at this point. TaskView Lifecycle:
             // `bind` -> `onBind` ->  onAttachedToWindow() -> onDetachFromWindow -> onRecycle
-            coroutineJobs +=
-                viewModel!!.tintAmount.onEach(::updateTintAmount).launchIn(coroutineScope)
-
             coroutineJobs +=
                 coroutineScope.launch { viewModel!!.state.collectLatest(::updateTaskViewState) }
         }
     }
 
-    private fun updateTintAmount(amount: Float) {
-        taskContainers.forEach { it.updateTintAmount(amount) }
-    }
-
     private fun updateTaskViewState(state: TaskTileUiState) {
         sysUiStatusNavFlags = state.sysUiStatusNavFlags
 
@@ -1531,7 +1523,9 @@ constructor(
     /** Set a color tint on the snapshot and supporting views. */
     open fun setColorTint(amount: Float, tintColor: Int) {
         taskContainers.forEach {
-            if (!enableRefactorTaskThumbnail()) {
+            if (enableRefactorTaskThumbnail()) {
+                it.updateTintAmount(amount)
+            } else {
                 it.thumbnailViewDeprecated.dimAlpha = amount
             }
             it.iconView.setIconColorTint(tintColor, amount)