Merge "binder: fix signedness error in printHexData" am: c7dd91b4e8 am: 91068b6034 am: 8c8eb8dbfe am: 05ec5cfe61

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1504432

Change-Id: Ia4295322170b198b0ca2a2141dda032622ccfca8