[Expressive design] Update SPA Appbar.

Update container color.
Update back icon size.
Screenshot: https://screenshot.googleplex.com/9KqVsoj2uv7Pv5a

Bug: 349681531
Flag: EXEMPT migration
Test: visual
Change-Id: I94e98d00819926ba584d15d4df6540142e602361
diff --git a/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/framework/theme/SettingsDimension.kt b/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/framework/theme/SettingsDimension.kt
index 08bedf9..fcaedd2 100644
--- a/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/framework/theme/SettingsDimension.kt
+++ b/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/framework/theme/SettingsDimension.kt
@@ -33,9 +33,8 @@
     val spinnerHorizontalPadding = paddingExtraLarge
     val spinnerVerticalPadding = paddingLarge
 
-    val actionIconWidth = 32.dp
-    val actionIconHeight = 40.dp
-    val actionIconPadding = 4.dp
+    val actionIconSize = 40.dp
+    val actionIconPadding = 8.dp
 
     val itemIconSize = 24.dp
     val itemIconContainerSizeSmall = 40.dp
diff --git a/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/scaffold/Actions.kt b/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/scaffold/Actions.kt
index f99d206..668f683 100644
--- a/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/scaffold/Actions.kt
+++ b/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/scaffold/Actions.kt
@@ -56,32 +56,27 @@
     IconButton(
         onClick = onClick,
         modifier =
-        if (isSpaExpressiveEnabled)
-            Modifier
-                .padding(
-                    start = SettingsDimension.paddingLarge,
-                    end = SettingsDimension.paddingSmall,
-                    top = SettingsDimension.paddingExtraSmall,
-                    bottom = SettingsDimension.paddingExtraSmall,
-                )
-                .size(SettingsDimension.actionIconWidth, SettingsDimension.actionIconHeight)
-                .clip(SettingsShape.CornerExtraLarge)
-        else Modifier,
+            if (isSpaExpressiveEnabled)
+                Modifier.padding(
+                        start = SettingsDimension.paddingExtraSmall5,
+                        end = SettingsDimension.paddingSmall,
+                        top = SettingsDimension.paddingExtraSmall,
+                        bottom = SettingsDimension.paddingExtraSmall,
+                    )
+                    .size(SettingsDimension.actionIconSize)
+                    .clip(SettingsShape.CornerExtraLarge)
+            else Modifier,
     ) {
         Icon(
             imageVector = Icons.AutoMirrored.Outlined.ArrowBack,
             contentDescription = contentDescription,
             modifier =
-            if (isSpaExpressiveEnabled)
-                Modifier
-                    .size(
-                        SettingsDimension.actionIconWidth,
-                        SettingsDimension.actionIconHeight,
-                    )
-                    .clip(SettingsShape.CornerExtraLarge)
-                    .background(MaterialTheme.colorScheme.surfaceContainerHighest)
-                    .padding(SettingsDimension.actionIconPadding)
-            else Modifier,
+                if (isSpaExpressiveEnabled)
+                    Modifier.size(SettingsDimension.actionIconSize)
+                        .clip(SettingsShape.CornerExtraLarge)
+                        .background(MaterialTheme.colorScheme.surfaceContainerHighest)
+                        .padding(SettingsDimension.actionIconPadding)
+                else Modifier,
         )
     }
 }
diff --git a/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/scaffold/CustomizedAppBar.kt b/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/scaffold/CustomizedAppBar.kt
index 693fb35..0c0ece4 100644
--- a/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/scaffold/CustomizedAppBar.kt
+++ b/packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/scaffold/CustomizedAppBar.kt
@@ -142,10 +142,11 @@
     Text(
         text = title,
         modifier =
-            Modifier.padding(
+            Modifier
+                .padding(
                     start =
-                        if (isSpaExpressiveEnabled) SettingsDimension.paddingExtraSmall
-                        else SettingsDimension.itemPaddingAround,
+                    if (isSpaExpressiveEnabled) SettingsDimension.paddingExtraSmall
+                    else SettingsDimension.itemPaddingAround,
                     end = SettingsDimension.itemPaddingEnd,
                 )
                 .semantics { heading() },
@@ -156,13 +157,22 @@
 
 @Composable
 private fun topAppBarColors() =
-    TopAppBarColors(
-        containerColor = MaterialTheme.colorScheme.settingsBackground,
-        scrolledContainerColor = MaterialTheme.colorScheme.surfaceVariant,
-        navigationIconContentColor = MaterialTheme.colorScheme.onSurface,
-        titleContentColor = MaterialTheme.colorScheme.onSurface,
-        actionIconContentColor = MaterialTheme.colorScheme.onSurfaceVariant,
-    )
+    if (isSpaExpressiveEnabled)
+        TopAppBarColors(
+            containerColor = MaterialTheme.colorScheme.surfaceContainer,
+            scrolledContainerColor = MaterialTheme.colorScheme.surfaceContainer,
+            navigationIconContentColor = MaterialTheme.colorScheme.onSurface,
+            titleContentColor = MaterialTheme.colorScheme.onSurface,
+            actionIconContentColor = MaterialTheme.colorScheme.primary,
+        )
+    else
+        TopAppBarColors(
+            containerColor = MaterialTheme.colorScheme.settingsBackground,
+            scrolledContainerColor = MaterialTheme.colorScheme.surfaceVariant,
+            navigationIconContentColor = MaterialTheme.colorScheme.onSurface,
+            titleContentColor = MaterialTheme.colorScheme.onSurface,
+            actionIconContentColor = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
 
 /**
  * Represents the colors used by a top app bar in different states.
@@ -257,14 +267,16 @@
     // Compose a Surface with a TopAppBarLayout content.
     Box(
         modifier =
-            Modifier.drawBehind { drawRect(color = colors.scrolledContainerColor) }
+            Modifier
+                .drawBehind { drawRect(color = colors.scrolledContainerColor) }
                 .semantics { isTraversalGroup = true }
                 .pointerInput(Unit) {}
     ) {
         val height = LocalDensity.current.run { ContainerHeight.toPx() }
         TopAppBarLayout(
             modifier =
-                Modifier.windowInsetsPadding(windowInsets)
+                Modifier
+                    .windowInsetsPadding(windowInsets)
                     // clip after padding so we don't show the title over the inset area
                     .clipToBounds(),
             heightPx = height,
@@ -387,7 +399,8 @@
         Column {
             TopAppBarLayout(
                 modifier =
-                    Modifier.windowInsetsPadding(windowInsets)
+                    Modifier
+                        .windowInsetsPadding(windowInsets)
                         // clip after padding so we don't show the title over the inset area
                         .clipToBounds(),
                 heightPx = pinnedHeightPx,
@@ -495,14 +508,17 @@
 ) {
     Layout(
         {
-            Box(Modifier.layoutId("navigationIcon").padding(start = TopAppBarHorizontalPadding)) {
+            Box(Modifier
+                .layoutId("navigationIcon")
+                .padding(start = TopAppBarHorizontalPadding)) {
                 CompositionLocalProvider(
                     LocalContentColor provides navigationIconContentColor,
                     content = navigationIcon,
                 )
             }
             Box(
-                Modifier.layoutId("title")
+                Modifier
+                    .layoutId("title")
                     .padding(horizontal = TopAppBarHorizontalPadding)
                     .then(if (hideTitleSemantics) Modifier.clearAndSetSemantics {} else Modifier)
                     .graphicsLayer { alpha = titleAlpha() }
@@ -521,7 +537,9 @@
                     )
                 }
             }
-            Box(Modifier.layoutId("actionIcons").padding(end = TopAppBarHorizontalPadding)) {
+            Box(Modifier
+                .layoutId("actionIcons")
+                .padding(end = TopAppBarHorizontalPadding)) {
                 CompositionLocalProvider(
                     LocalContentColor provides actionIconContentColor,
                     content = actions,