Fix auto-generated setter for sysprop-as-api am: 1f060051fd am: 7b188d1abb am: da57aae3fb am: 602ba1fe9c

Original change: https://android-review.googlesource.com/c/platform/system/tools/sysprop/+/1418575

Change-Id: I6063f6944bff384cb5cc424ce30c423b5b6d4510