Merge "Merge "Revert "towctrans() should return the input and set errno on failure."" into android15-tests-dev am: fd55858120" into main am: 4a07464a7a am: 0bacb659cc

Original change: https://android-review.googlesource.com/c/platform/bionic/+/3261398

Change-Id: I15f7ccd76e7619819b78c0f272431c78fb8edf16
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>