Merge "Revert "libbinder_ndk: toString never goes to empty strings."" am: d513a26af2 am: aa8fdc0a71 am: 8442f463f3

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2321904

Change-Id: I8170751327caa6457f23571509c1b10b30f3220d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>