Themed Icons: Introduce Utils::Icon

Instead of describing icons via file name or in the themed icons case
via
a string that is a list of mask/color pairs, we have now a class for it.

Icons are now listed in per-plugin *icons.h headers.

RunControl::m_icon was The only place left where an icon property was in
fact a string. This patch changes that member to be a Utils::Icon.

Change-Id: Ibcfa8bb25e6d2e330c567ee7ccc0b97ead603177
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

src/plugins/android/androidruncontrol.cpp

@@ -35,6 +35,7 @@
 #include "androidrunner.h"
 
 #include <projectexplorer/projectexplorerconstants.h>
+#include <projectexplorer/projectexplorericons.h>
 
 using namespace ProjectExplorer;
 
@@ -46,7 +47,7 @@ AndroidRunControl::AndroidRunControl(AndroidRunConfiguration *rc)
     , m_runner(new AndroidRunner(this, rc, ProjectExplorer::Constants::NORMAL_RUN_MODE))
     , m_running(false)
 {
-    setIcon(QLatin1String(ProjectExplorer::Constants::ICON_RUN_SMALL));
+    setIcon(Icons::RUN_SMALL);
 }
 
 AndroidRunControl::~AndroidRunControl()