Revert "Revert "Migrate ENABLE_GRID_ONLY_OVERVIEW to aconfig flag""

This reverts commit 7b5472f9864f6d563284d5ea896d5b3aaa01747e.

Reason for revert: aconfig/SetFlagsRule actually works with TAPL tests (http://ag/c/platform/packages/apps/Launcher3/+/24991890/comment/8303a3c6_030ae00b/)
Bug: 270397206

Change-Id: I7529a64c3197e4c2b4d5fb1e46fb29bdea1e52e9
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 94eb7a3..f61723a 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -1761,7 +1761,7 @@
 
     /** Gets the space that the overview actions will take, including bottom margin. */
     public int getOverviewActionsClaimedSpace() {
-        int overviewActionsSpace = isTablet && FeatureFlags.enableGridOnlyOverview()
+        int overviewActionsSpace = isTablet && Flags.enableGridOnlyOverview()
                 ? 0
                 : (overviewActionsTopMarginPx + overviewActionsHeight);
         return overviewActionsSpace + getOverviewActionsClaimedSpaceBelow();