Set use low res snapshots for low ram devices missing in theme snapshot

Creating new tasksnapshot from app theme was missing to set the reduced
flag to true.

Test: settings to smart lock and pass pattern/password
Bug: 65534047
Change-Id: I78e9fed223ffc4c7a9cb8d31836b18f1fc4e7d34

services/core/java/com/android/server/wm/TaskSnapshotController.java

@@ -299,7 +299,7 @@ class TaskSnapshotController {
 
         return new TaskSnapshot(hwBitmap.createGraphicBufferHandle(),
                 topChild.getConfiguration().orientation, mainWindow.mStableInsets,
-                false /* reduced */, 1.0f /* scale */);
+                ActivityManager.isLowRamDeviceStatic() /* reduced */, 1.0f /* scale */);
     }
 
     /**