Android Mainline 12.0.0 Release 39 (7816165,com.google.android.tzdata3)
Merge "follows the advice of -Wsign-compare" am: 1545889256 am: c1c27d597c am: 361384c81d am: 585ad4f655

Original change: https://android-review.googlesource.com/c/platform/system/tools/sysprop/+/1613110

Change-Id: I40c0713a86a44ad01e8038ea7417160d9c7f4ca2