Merge "libgui: no use readString16Inplace" am: b1d6aaa8a5 am: eabc791b14 am: 16524d223a am: e1b2728bce

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1487916

Change-Id: I52d5961f73218bef5fbb4a769806ba54dbc252ff