Adds ENABLE_FLOATING_SEARCH_BOX flag for All Apps.

This defines how the All Apps screen should be laid out without
anchoring to the search bar at the top, as follows:
 - Header view aligns to the top instead of below search bar.
 - Same for A-Z list.
 - Scroller is aligned to the header view to receive the above
   adjustments automatically.
 - A-Z list is set above search bar to not peek from below.
 - Search bar is set to align parent bottom and translates up
   with the keyboard.
 - Button to disable work apps is raised above the search bar.

Bug: 213954333
Test: Manually with flag enabled/disabled, Always show keyboard
enabled/disabled, and work profile enabled/disabled.

Change-Id: If90bb39a890029fa7056367fe62bad0677f0b86e

src/com/android/launcher3/allapps/WorkProfileManager.java

@@ -26,12 +26,14 @@ import android.os.Process;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.util.Log;
+import android.view.ViewGroup;
 
 import androidx.annotation.IntDef;
 import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
 
 import com.android.launcher3.R;
+import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.workprofile.PersonalWorkSlidingTabStrip;
 
@@ -138,6 +140,15 @@ public class WorkProfileManager implements PersonalWorkSlidingTabStrip.OnActiveP
             mWorkModeSwitch = (WorkModeSwitch) mAllApps.getLayoutInflater().inflate(
                     R.layout.work_mode_fab, mAllApps, false);
         }
+        int workFabMarginBottom =
+                mWorkModeSwitch.getResources().getDimensionPixelSize(R.dimen.work_fab_margin);
+        if (FeatureFlags.ENABLE_FLOATING_SEARCH_BAR.get()) {
+            workFabMarginBottom <<= 1;  // Double margin to add space above search bar.
+            workFabMarginBottom +=
+                    mWorkModeSwitch.getResources().getDimensionPixelSize(R.dimen.qsb_widget_height);
+        }
+        ((ViewGroup.MarginLayoutParams) mWorkModeSwitch.getLayoutParams()).bottomMargin =
+                workFabMarginBottom;
         if (mWorkModeSwitch.getParent() != mAllApps) {
             mAllApps.addView(mWorkModeSwitch);
         }
@@ -158,7 +169,6 @@ public class WorkProfileManager implements PersonalWorkSlidingTabStrip.OnActiveP
         mWorkModeSwitch = null;
     }
 
-
     public WorkAdapterProvider getAdapterProvider() {
         return mAdapterProvider;
     }