Support desktop device category in grid options

Adds desktop enum value to grid option deviceCategory attribute type.
The device type is used for devices that have
`R.bool.desktop_form_factor` config value set.

Bug: 30153091
Flag: com.android.launcher3.enable_scalability_for_desktop_experience
Test: Manual
Change-Id: Ie4747b5bae3e124e914af51445778c9b6285ff66

res/values/attrs.xml

@@ -296,6 +296,8 @@
             <flag name="tablet" value="2" />
             <!-- Enable on multi display devices only -->
             <flag name="multi_display" value="4" />
+            <!-- Enable on desktop devices only -->
+            <flag name="desktop" value="8" />
         </attr>
 
         <!-- By default all are false -->

src/com/android/launcher3/InvariantDeviceProfile.java

@@ -106,13 +106,14 @@ public class InvariantDeviceProfile {
             "idp_non_fixed_landscape_grid_name";
 
     @Retention(RetentionPolicy.SOURCE)
-    @IntDef({TYPE_PHONE, TYPE_MULTI_DISPLAY, TYPE_TABLET})
+    @IntDef({TYPE_PHONE, TYPE_MULTI_DISPLAY, TYPE_TABLET, TYPE_DESKTOP})
     public @interface DeviceType {
     }
 
     public static final int TYPE_PHONE = 0;
     public static final int TYPE_MULTI_DISPLAY = 1;
     public static final int TYPE_TABLET = 2;
+    public static final int TYPE_DESKTOP = 3;
 
     private static final float ICON_SIZE_DEFINED_IN_APP_DP = 48;
 
@@ -1008,8 +1009,10 @@ public class InvariantDeviceProfile {
         private static final int DEVICE_CATEGORY_PHONE = 1 << 0;
         private static final int DEVICE_CATEGORY_TABLET = 1 << 1;
         private static final int DEVICE_CATEGORY_MULTI_DISPLAY = 1 << 2;
+        private static final int DEVICE_CATEGORY_DESKTOP = 1 << 3;
         private static final int DEVICE_CATEGORY_ANY =
-                DEVICE_CATEGORY_PHONE | DEVICE_CATEGORY_TABLET | DEVICE_CATEGORY_MULTI_DISPLAY;
+                DEVICE_CATEGORY_PHONE | DEVICE_CATEGORY_TABLET | DEVICE_CATEGORY_MULTI_DISPLAY
+                        | DEVICE_CATEGORY_DESKTOP;
 
         private static final int INLINE_QSB_FOR_PORTRAIT = 1 << 0;
         private static final int INLINE_QSB_FOR_LANDSCAPE = 1 << 1;
@@ -1234,6 +1237,9 @@ public class InvariantDeviceProfile {
                 case TYPE_MULTI_DISPLAY:
                     return (deviceCategory & DEVICE_CATEGORY_MULTI_DISPLAY)
                             == DEVICE_CATEGORY_MULTI_DISPLAY;
+                case TYPE_DESKTOP:
+                    return (deviceCategory & DEVICE_CATEGORY_DESKTOP)
+                            == DEVICE_CATEGORY_DESKTOP;
                 default:
                     return false;
             }

src/com/android/launcher3/util/DisplayController.java

@@ -18,6 +18,8 @@ package com.android.launcher3.util;
 import static android.view.Display.DEFAULT_DISPLAY;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION;
 
+import static com.android.launcher3.Flags.enableScalabilityForDesktopExperience;
+import static com.android.launcher3.InvariantDeviceProfile.TYPE_DESKTOP;
 import static com.android.launcher3.InvariantDeviceProfile.TYPE_MULTI_DISPLAY;
 import static com.android.launcher3.InvariantDeviceProfile.TYPE_PHONE;
 import static com.android.launcher3.InvariantDeviceProfile.TYPE_TABLET;
@@ -53,6 +55,7 @@ import androidx.annotation.VisibleForTesting;
 import com.android.launcher3.InvariantDeviceProfile.DeviceType;
 import com.android.launcher3.LauncherPrefChangeListener;
 import com.android.launcher3.LauncherPrefs;
+import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.dagger.ApplicationContext;
 import com.android.launcher3.dagger.LauncherAppComponent;
@@ -507,6 +510,7 @@ public class DisplayController implements DesktopVisibilityListener {
 
         private final boolean mShowLockedTaskbarOnHome;
         private final boolean mIsHomeVisible;
+        private final boolean mIsDesktopFormFactor;
 
         private final boolean mShowDesktopTaskbarForFreeformDisplay;
 
@@ -573,6 +577,8 @@ public class DisplayController implements DesktopVisibilityListener {
             mShowDesktopTaskbarForFreeformDisplay = wmProxy.showDesktopTaskbarForFreeformDisplay(
                     displayInfoContext);
             mIsHomeVisible = wmProxy.isHomeVisible();
+            mIsDesktopFormFactor = enableScalabilityForDesktopExperience()
+                    && displayInfoContext.getResources().getBoolean(R.bool.desktop_form_factor);
         }
 
         /**
@@ -657,6 +663,10 @@ public class DisplayController implements DesktopVisibilityListener {
         }
 
         public @DeviceType int getDeviceType() {
+            if (mIsDesktopFormFactor) {
+                return TYPE_DESKTOP;
+            }
+
             int flagPhone = 1 << 0;
             int flagTablet = 1 << 1;