Fix auto-generated setter for sysprop-as-api am: 1f060051fd am: 7b188d1abb am: da57aae3fb am: 602ba1fe9c am: 13427ac0d4

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

Change-Id: Iaa6d94de9a4c21affd33ab352b2c4eed7fdae174