Don't allow starting DeveloperOptionsFragment on non-debug builds am: a343699760 am: 85435ff751 am: 81aee5e024

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15787659

Change-Id: Ia70df34fcf2715fcb1f8d9459bb7201521542583