Don't allow starting DeveloperOptionsFragment on non-debug builds am: a343699760 am: 9ac2800849 am: cfc02d0ef1

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

Change-Id: I17f6f75a70f7bae4cb3c4060ca636457c2cfbc8a