Add a SysPropBooleanFlag: wallpaper cropping for foldables

This adds a flag and a public static @hide API in WallpaperManager.

Bug: 270726737
Test: TreeHugger (no logic is changed by this CL)
Change-Id: I3da9acc845f85f64642d523eeffeac6cae76ef8b

core/java/android/app/IWallpaperManager.aidl

@@ -272,4 +272,11 @@ interface IWallpaperManager {
      * @hide
      */
      boolean isLockscreenLiveWallpaperEnabled();
+
+    /**
+     * Temporary method for project b/270726737.
+     * Return true if the wallpaper supports different crops for different display dimensions.
+     * @hide
+     */
+     boolean isMultiCropEnabled();
 }

core/java/android/app/WallpaperManager.java

@@ -314,6 +314,7 @@ public class WallpaperManager {
     private final boolean mWcgEnabled;
     private final ColorManagementProxy mCmProxy;
     private static Boolean sIsLockscreenLiveWallpaperEnabled = null;
+    private static Boolean sIsMultiCropEnabled = null;
 
     /**
      * Special drawable that draws a wallpaper as fast as possible.  Assumes
@@ -865,6 +866,26 @@ public class WallpaperManager {
         return sIsLockscreenLiveWallpaperEnabled;
     }
 
+    /**
+     * Temporary method for project b/270726737
+     * @return true if the wallpaper supports different crops for different display dimensions
+     * @hide
+     */
+    public static boolean isMultiCropEnabled() {
+        if (sGlobals == null) {
+            sIsMultiCropEnabled = SystemProperties.getBoolean(
+                    "persist.wm.debug.wallpaper_multi_crop", false);
+        }
+        if (sIsMultiCropEnabled == null) {
+            try {
+                sIsMultiCropEnabled = sGlobals.mService.isMultiCropEnabled();
+            } catch (RemoteException e) {
+                e.rethrowFromSystemServer();
+            }
+        }
+        return sIsMultiCropEnabled;
+    }
+
     /**
      * Indicate whether wcg (Wide Color Gamut) should be enabled.
      * <p>

packages/SystemUI/src/com/android/systemui/flags/Flags.kt

@@ -525,6 +525,13 @@ object Flags {
     @JvmField val LOCKSCREEN_LIVE_WALLPAPER =
         sysPropBooleanFlag(1117, "persist.wm.debug.lockscreen_live_wallpaper", default = false)
 
+    // TODO(b/281648899): Tracking bug
+    @Keep
+    @JvmField
+    val WALLPAPER_MULTI_CROP =
+        sysPropBooleanFlag(1118, "persist.wm.debug.wallpaper_multi_crop", default = false)
+
+
     // 1200 - predictive back
     @Keep
     @JvmField

services/core/java/com/android/server/wallpaper/WallpaperManagerService.java

@@ -181,6 +181,8 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
     private final Object mLock = new Object();
     /** True to enable a second engine for lock screen wallpaper when different from system wp. */
     private final boolean mIsLockscreenLiveWallpaperEnabled;
+    /** True to support different crops for different display dimensions */
+    private final boolean mIsMultiCropEnabled;
     /** Tracks wallpaper being migrated from system+lock to lock when setting static wp. */
     WallpaperDestinationChangeHandler mPendingMigrationViaStatic;
 
@@ -1600,6 +1602,8 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
 
         mIsLockscreenLiveWallpaperEnabled =
                 SystemProperties.getBoolean("persist.wm.debug.lockscreen_live_wallpaper", false);
+        mIsMultiCropEnabled =
+                SystemProperties.getBoolean("persist.wm.debug.wallpaper_multi_crop", false);
         LocalServices.addService(WallpaperManagerInternal.class, new LocalService());
     }
 
@@ -3724,6 +3728,11 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
         return mIsLockscreenLiveWallpaperEnabled;
     }
 
+    @Override
+    public boolean isMultiCropEnabled() {
+        return mIsMultiCropEnabled;
+    }
+
     private void onDisplayReadyInternal(int displayId) {
         synchronized (mLock) {
             if (mLastWallpaper == null) {