Fix StorageVolume Parcel parsing

We write String8 so should readString8 and not readString which
defaults to readString16

Bug: 170481432
Test: Manual
Change-Id: Id4b3802fd8669403f78a355fcb2c0fedfb239e72

core/java/android/os/storage/StorageVolume.java

@@ -163,7 +163,7 @@ public final class StorageVolume implements Parcelable {
         mMaxFileSize = in.readLong();
         mOwner = in.readParcelable(null);
         if (in.readInt() != 0) {
-            mUuid = StorageManager.convert(in.readString());
+            mUuid = StorageManager.convert(in.readString8());
         } else {
             mUuid = null;
         }