Redraw every open copy of the launcher when a setting changes

Opening the launcher like an app (the installer's "Open") and then making it
the home app leaves two launcher activities in one process. A changed setting
recreated whichever one LawnchairApp.launcher returned, which could be the one
in the background, so the home screen kept its old look until a restart.

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>

lawnchair/src/app/lawnchair/LawnchairApp.kt

@@ -214,6 +214,10 @@ class LawnchairApp : LauncherApplication() {
         val launcher: LawnchairLauncher?
             get() = activities.filterIsInstance<LawnchairLauncher>().firstOrNull()
 
+        // Flexera Launcher: see LawnchairApp.launchers.
+        val launchers: List<LawnchairLauncher>
+            get() = activities.filterIsInstance<LawnchairLauncher>()
+
         fun finishAll() {
             HashSet(activities).forEach { it.finish() }
         }
@@ -292,6 +296,14 @@ class LawnchairApp : LauncherApplication() {
         @JvmStatic
         val launcher: LawnchairLauncher? get() = instance.activityHandler.launcher
 
+        /**
+         * Flexera Launcher: every copy of the launcher that is open. There are two when it was
+         * opened like an app (from the installer's "Open", say) and then made the home app: one
+         * in the app's own task and one as the home screen. [launcher] picks either of them.
+         */
+        @JvmStatic
+        val launchers: List<LawnchairLauncher> get() = instance.activityHandler.launchers
+
         @OptIn(ExperimentalMaterial3ExpressiveApi::class, ExperimentalMaterial3Api::class)
         fun Launcher.showQuickstepWarningIfNecessary() {
             val launcher = this

lawnchair/src/app/lawnchair/LawnchairLauncher.kt

@@ -517,7 +517,10 @@ class LawnchairLauncher : QuickstepLauncher() {
 
     fun recreateIfNotScheduled() {
         if (sRestartFlags == 0) {
-            recreate()
+            // Flexera Launcher: every open copy, not only this one. A changed setting used to
+            // rebuild whichever copy LawnchairApp.launcher happened to return, which could be
+            // the one in the background, and the home screen kept its old look until restart.
+            (LawnchairApp.launchers + this).distinct().forEach { it.recreate() }
         }
     }