Pass main executor to PluginInstanceManager.Factory.

Bug: 194781951
Test: manual
Change-Id: I1667023887e0c8d1dc86fce1717a3032b6721684
diff --git a/quickstep/src/com/android/launcher3/uioverrides/plugins/PluginManagerWrapper.java b/quickstep/src/com/android/launcher3/uioverrides/plugins/PluginManagerWrapper.java
index c604def..f653906 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/plugins/PluginManagerWrapper.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/plugins/PluginManagerWrapper.java
@@ -53,8 +53,7 @@
         PluginInitializerImpl pluginInitializer  = new PluginInitializerImpl();
         mPluginEnabler = new PluginEnablerImpl(c);
         PluginInstanceManager.Factory instanceManagerFactory = new PluginInstanceManager.Factory(
-                c, c.getPackageManager(),  MODEL_EXECUTOR, MODEL_EXECUTOR.getLooper(),
-                pluginInitializer);
+                c, c.getPackageManager(), c.getMainExecutor(), MODEL_EXECUTOR, pluginInitializer);
 
         mPluginManager = new PluginManagerImpl(c, instanceManagerFactory,
                 pluginInitializer.isDebuggable(),