Fix SpaLib build after Compose 1.3.0

1. Add OptIn to fix build for settingsTopAppBarColors
   OptIn ExperimentalMaterial3Api for new version of Compose library.

2. Fix return is not allowed in remember.

Bug: 235727273
Test: m SpaLib
Test: m SpaPrivilegedLib
Change-Id: I2c8ba698b79178bf7940f29574b5dc6a38b0d0cf

packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/scaffold/SettingsScaffold.kt

@@ -61,6 +61,7 @@ fun SettingsScaffold(
     )
 }
 
+@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 internal fun settingsTopAppBarColors() = TopAppBarDefaults.largeTopAppBarColors(
     containerColor = SettingsTheme.colorScheme.surfaceHeader,

packages/SettingsLib/SpaPrivileged/src/com/android/settingslib/spaprivileged/template/app/AppInfoPage.kt

@@ -32,10 +32,11 @@ fun AppInfoPage(
 ) {
     RegularScaffold(title = title) {
         val appInfoProvider = remember {
-            val packageInfo = PackageManagers.getPackageInfoAsUser(packageName, userId)
-                ?: return@RegularScaffold
-            AppInfoProvider(packageInfo)
-        }
+            PackageManagers.getPackageInfoAsUser(packageName, userId)?.let { packageInfo ->
+                AppInfoProvider(packageInfo)
+            }
+        } ?: return@RegularScaffold
+
         appInfoProvider.AppInfo(displayVersion = true)
 
         content()

packages/SettingsLib/SpaPrivileged/src/com/android/settingslib/spaprivileged/template/app/TogglePermissionAppInfoPage.kt

@@ -143,9 +143,11 @@ private fun <T : AppRecord> createSwitchModel(
     userId: Int,
 ): TogglePermissionSwitchModel<T>? {
     val record = remember {
-        val app = PackageManagers.getApplicationInfoAsUser(packageName, userId) ?: return null
-        listModel.transformItem(app)
-    }
+        PackageManagers.getApplicationInfoAsUser(packageName, userId)?.let { app ->
+            listModel.transformItem(app)
+        }
+    } ?: return null
+
     val context = LocalContext.current
     val isAllowed = listModel.isAllowed(record)
     return remember {