Explicitly reference framework-wifi app build rule am: 20dd58aa8d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12752580

Change-Id: Ic9cbad0d25c589bf51dfef0e48ca41aca51fa450
tree: 94b5b093d27304085e8f2484a905d72261cecc13
  1. Tethering/