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

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

Change-Id: If61b642f5442ac98270d5cb5ae542df8d08e8ed2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>