[WIFI][MAINLINE] Transition WificondControl interfaces: DeathListner -> Runnable

Transition WificondControl public interfaces to that class itself.
Preparation for the class being extracted to an official API.

Classes shifted: DeathListner -> Runnable

Bug: 140062898
Test: atest android.net.wifi
Test: atest com.android.server.wifi
Change-Id: Iad2c3b2006f63b159e048f3b2c9d4261404d6e96
4 files changed
tree: 926aa1c3f80b3f89c0d6a0fc0425b729646392f9
  1. apex/
  2. service/
  3. PREUPLOAD.cfg