Add stability task end state

Author: mlykotom

PerformanceCodelab/app/build.gradle.kts

@@ -69,9 +69,10 @@ composeCompiler {
     // This settings enables strong-skipping mode for all module in this project.
     // As an effect, Compose can skip a composable even if it's unstable by comparing it's instance equality (===).
     // TODO Codelab task: Enable Strong Skipping Mode
-    enableStrongSkippingMode = false
+    enableStrongSkippingMode = true
 
     // TODO Codelab task: Enable Stability Configuration file
+    stabilityConfigurationFile = project.rootDir.resolve("stability_config.conf")
 }
 
 dependencies {

PerformanceCodelab/app/src/main/java/com/compose/performance/stability/StabilityViewModel.kt

@@ -15,6 +15,7 @@
  */
 package com.compose.performance.stability
 
+import androidx.compose.runtime.Immutable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.neverEqualPolicy
@@ -32,6 +33,7 @@ import kotlinx.coroutines.flow.onEach
 import kotlinx.coroutines.flow.stateIn
 
 // TODO Codelab task: make this class Stable
+@Immutable
 data class StabilityItem(
     val id: Int,
     val type: StabilityItemType,

PerformanceCodelab/stability_config.conf

@@ -1 +1,3 @@
 // TODO Codelab task: Make a java.time.LocalDate class stable.
+
+java.time.LocalDate