Migrate ENABLE_RESPONSIVE_WORKSPACE to aconfig

- Keeping FeatureFlags.ENABLE_RESPONSIVE_WORKSPACE for local testing until aconfig is available in FlagFlipper
- Still reference ENABLE_RESPONSIVE_WORKSPACE in tests as aconfig still can't be mocked

Bug: 299935275
Test: manual
Change-Id: I092df894a3624dca6b9d381d56ada71d807547b5

aconfig/launcher.aconfig

@@ -27,3 +27,10 @@ flag {
     description: "Enables cursor hover states for certain elements."
     bug: "243191650"
 }
+
+flag {
+    name: "enable_responsive_workspace"
+    namespace: "launcher"
+    description: "Enables new workspace grid calculations method."
+    bug: "241386436"
+}

src/com/android/launcher3/InvariantDeviceProfile.java

@@ -888,7 +888,7 @@ public class InvariantDeviceProfile {
             deviceCategory = a.getInt(R.styleable.GridDisplayOption_deviceCategory,
                     DEVICE_CATEGORY_ALL);
 
-            if (FeatureFlags.ENABLE_RESPONSIVE_WORKSPACE.get()) {
+            if (FeatureFlags.enableResponsiveWorkspace()) {
                 mWorkspaceSpecsId = a.getResourceId(
                         R.styleable.GridDisplayOption_workspaceSpecsId, INVALID_RESOURCE_HANDLE);
                 mWorkspaceSpecsTwoPanelId = a.getResourceId(

src/com/android/launcher3/config/FeatureFlags.java

@@ -422,9 +422,14 @@ public final class FeatureFlags {
     // TODO(Block 31): Clean up flags
 
     // TODO(Block 32): Clean up flags
+    // Aconfig migration complete for ENABLE_RESPONSIVE_WORKSPACE.
+    @VisibleForTesting
     public static final BooleanFlag ENABLE_RESPONSIVE_WORKSPACE = getDebugFlag(241386436,
             "ENABLE_RESPONSIVE_WORKSPACE", DISABLED,
             "Enables new workspace grid calculations method.");
+    public static boolean enableResponsiveWorkspace() {
+        return ENABLE_RESPONSIVE_WORKSPACE.get() || Flags.enableResponsiveWorkspace();
+    }
 
     // TODO(Block 33): Clean up flags
     public static final BooleanFlag ENABLE_ALL_APPS_RV_PREINFLATION = getDebugFlag(288161355,