Replace hidden Parcel.(read|write)CharSequence usages

This CL replaces above hidden API usages with below:
 - read: TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel
 - write: TextUtils.writeToParcel

The hidden APIs actually call those replacements, so this is safe to do.

Bug: 119783509
Test: mmm . (under frameworks/av/packages/MediaComponents)
Change-Id: Ifb3b432bee7ee072bbd544cb067749f073e5917a