Support single-user ImageWallpaper service

Bug: 206118673
Test: Manually check image wallpaper works for multi-user
Change-Id: Ic56fe799b2c6891f52db7a79348fdac4e0ef208b

core/java/android/service/wallpaper/WallpaperService.java

@@ -609,6 +609,18 @@ public abstract class WallpaperService extends Service {
             }
         }
 
+        /** @hide */
+        public void setShowForAllUsers(boolean show) {
+            mWindowPrivateFlags = show
+                    ? (mWindowPrivateFlags
+                        | WindowManager.LayoutParams.SYSTEM_FLAG_SHOW_FOR_ALL_USERS)
+                    : (mWindowPrivateFlags
+                        & ~WindowManager.LayoutParams.SYSTEM_FLAG_SHOW_FOR_ALL_USERS);
+            if (mCreated) {
+                updateSurface(false, false, false);
+            }
+        }
+
         /** {@hide} */
         @UnsupportedAppUsage
         public void setFixedSizeAllowed(boolean allowed) {

packages/SystemUI/AndroidManifest.xml

@@ -375,6 +375,7 @@
         </receiver>
 
         <service android:name=".ImageWallpaper"
+                android:singleUser="true"
                 android:permission="android.permission.BIND_WALLPAPER"
                 android:exported="true" />
 

packages/SystemUI/src/com/android/systemui/ImageWallpaper.java

@@ -126,6 +126,7 @@ public class ImageWallpaper extends WallpaperService {
             mRenderer = getRendererInstance();
             setFixedSizeAllowed(true);
             updateSurfaceSize();
+            setShowForAllUsers(true);
 
             mRenderer.setOnBitmapChanged(b -> {
                 mLocalColorsToAdd.addAll(mColorAreas);

packages/SystemUI/src/com/android/systemui/glwallpaper/ImageWallpaperRenderer.java

@@ -25,6 +25,7 @@ import android.app.WallpaperManager;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.Rect;
+import android.os.UserHandle;
 import android.util.Log;
 import android.util.Size;
 
@@ -142,7 +143,8 @@ public class ImageWallpaperRenderer implements GLWallpaperRenderer {
             mRefCount.incrementAndGet();
             synchronized (mRefCount) {
                 if (mBitmap == null) {
-                    mBitmap = mWallpaperManager.getBitmap(false /* hardware */);
+                    mBitmap = mWallpaperManager.getBitmapAsUser(UserHandle.USER_CURRENT,
+                            false /* hardware */);
                     mWcgContent = mWallpaperManager.wallpaperSupportsWcg(
                             WallpaperManager.FLAG_SYSTEM);
                     mWallpaperManager.forgetLoadedWallpaper();