use updated mStorage for new MtpObject when copy file between storages

copy file from sdcard to internal storage through MTP,
then the file can't be renamed

bug: 147715888

Change-Id: Iffeeeb1372e0ecf305cf0c70edb601a4b2001342

media/java/android/mtp/MtpStorageManager.java

@@ -229,9 +229,16 @@ public class MtpStorageManager {
         }
 
         private void setParent(MtpObject parent) {
+            if (this.getStorageId() != parent.getStorageId()) {
+                mStorage = Preconditions.checkNotNull(parent.getStorage());
+            }
             mParent = parent;
         }
 
+        private MtpStorage getStorage() {
+            return mStorage;
+        }
+
         private void setDir(boolean dir) {
             if (dir != mIsDir) {
                 mIsDir = dir;