[Toast] Switch to using device config to control keyboard sync.

Bug: 234812580
Test: followed the existing pattern and tested by manually setting and
unsetting the flag through command line - `adb shell device_config put
launcher enable_web_suggest_on_default_browser <true|false>`

Change-Id: Idd479e93b628b78fdf55d826c56f69c5cfdaf46e
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index a6831aa..5be63e3 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -1579,6 +1579,14 @@
         return mOldConfig.orientation;
     }
 
+    /**
+     * Whether keyboard sync is enabled for transitions between Home and All Apps.
+     * TODO(b/251387263): move this method inside an All Apps specific config class.
+     */
+    public boolean isKeyboardSyncEnabled() {
+        return false;
+    }
+
     @Override
     protected void onNewIntent(Intent intent) {
         if (Utilities.IS_RUNNING_IN_TEST_HARNESS) {
diff --git a/src/com/android/launcher3/allapps/AllAppsTransitionController.java b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
index 872c4fd..001b494 100644
--- a/src/com/android/launcher3/allapps/AllAppsTransitionController.java
+++ b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
@@ -39,7 +39,6 @@
 import com.android.launcher3.anim.AnimatorListeners;
 import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.anim.PropertySetter;
-import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.statemanager.StateManager.StateHandler;
 import com.android.launcher3.states.StateAnimationConfig;
 import com.android.launcher3.util.MultiPropertyFactory;
@@ -229,7 +228,7 @@
             StateAnimationConfig config, PendingAnimation builder) {
         if (mLauncher.isInState(ALL_APPS) && !ALL_APPS.equals(toState)) {
             // For atomic animations, we close the keyboard immediately.
-            if (!config.userControlled && !FeatureFlags.ENABLE_KEYBOARD_TRANSITION_SYNC.get()) {
+            if (!config.userControlled && !mLauncher.isKeyboardSyncEnabled()) {
                 mLauncher.getAppsView().getSearchUiManager().getEditText().hideKeyboard();
             }
 
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index 50cf8d6..046378a 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -249,11 +249,6 @@
     public static final BooleanFlag ENABLE_ONE_SEARCH_MOTION = new DeviceFlag(
             "ENABLE_ONE_SEARCH_MOTION", true, "Enables animations in OneSearch.");
 
-    public static final BooleanFlag ENABLE_KEYBOARD_TRANSITION_SYNC = new DeviceFlag(
-            "ENABLE_KEYBOARD_TRANSITION_SYNC", IS_STUDIO_BUILD,
-            "Enable option to synchronize the keyboard open and close animations when transitioning"
-                    + " between home and all apps");
-
     public static final BooleanFlag ENABLE_SHOW_KEYBOARD_OPTION_IN_ALL_APPS = new DeviceFlag(
             "ENABLE_SHOW_KEYBOARD_OPTION_IN_ALL_APPS", true,
             "Enable option to show keyboard when going to all-apps");