Always refresh device profile when multi window mode changed

Launcher monitors multi-window mode changed and updates device profile
through configuration chagned callback. It's possible that a new
configuration contains multi-window mode changed but without screen
size size change that across screen layout qualifier. Client apps might
not even receive onConfingurationChagned.

Updates Launcher to monitor multi-window mode changed through
onMultiWindowModeChanged to make sure it always refreshes device profile
that matches with the latest mulati-window mode.

Fix: 197835119
Test: manual check the repo steps.
Change-Id: Ie99045a1fc8493ff37645b95e7ccd9d15478d862

src/com/android/launcher3/Launcher.java

@@ -554,6 +554,14 @@ public class Launcher extends StatefulActivity<LauncherState> implements Launche
         AbstractFloatingView.closeOpenViews(this, false, TYPE_ICON_SURFACE);
     }
 
+    @Override
+    public void onMultiWindowModeChanged(boolean isInMultiWindowMode, Configuration newConfig) {
+        super.onMultiWindowModeChanged(isInMultiWindowMode, newConfig);
+        // Always update device profile when multi window mode changed.
+        initDeviceProfile(mDeviceProfile.inv);
+        dispatchDeviceProfileChanged();
+    }
+
     @Override
     public void onConfigurationChanged(Configuration newConfig) {
         int diff = newConfig.diff(mOldConfig);
@@ -592,11 +600,9 @@ public class Launcher extends StatefulActivity<LauncherState> implements Launche
 
     private void initDeviceProfile(InvariantDeviceProfile idp) {
         // Load configuration-specific DeviceProfile
-        mDeviceProfile = idp.getDeviceProfile(this);
-        if (isInMultiWindowMode()) {
-            mDeviceProfile = mDeviceProfile.getMultiWindowProfile(
-                    this, getMultiWindowDisplaySize());
-        }
+        mDeviceProfile = isInMultiWindowMode()
+                ? mDeviceProfile.getMultiWindowProfile(this, getMultiWindowDisplaySize())
+                : idp.getDeviceProfile(this);
 
         onDeviceProfileInitiated();
         mModelWriter = mModel.getWriter(getDeviceProfile().isVerticalBarLayout(), true, this);