Android: Convert into a RunWorker based setup

This moves all of the RunControl implementation into a single
RunWorker, not yet splitting it up into separate RunWorkers
which is the final goal of this series.

Change-Id: I7373105603505aa4fffd7fe5ff0145f0128b34bc
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/debugger/debuggerruncontrol.h

@@ -70,7 +70,7 @@ public:
     void notifyEngineRemoteServerRunning(const QByteArray &msg, int pid);
     void notifyEngineRemoteSetupFinished(const RemoteSetupResult &result);
     void notifyInferiorIll();
-    Q_SLOT void notifyInferiorExited();
+    Q_SLOT void notifyInferiorExited(); // Called from Android.
     void quitDebugger();
     void abortDebugger();
     void debuggingFinished();