Try to fix multi invocation problem

Author: asodja

subprojects/studio-plugin/src/main/java/org/gradle/profiler/studio/plugin/client/GradleProfilerClient.java

@@ -74,7 +74,13 @@ private void handleSyncRequest(StudioRequest request, Project project, GradleSys
 
         // In some cases sync could happen before we trigger it,
         // for example when we open a project for the first time.
+        // Wait in case Gradle sync is run before indexing
         waitOnPreviousGradleSyncFinish(project);
+        // Wait on initial indexing
+        waitOnBackgroundProcessesFinish(project);
+        // Wait in case Gradle sync is run after indexing
+        waitOnPreviousGradleSyncFinish(project);
+        // Wait on indexing after sync
         waitOnBackgroundProcessesFinish(project);
 
         LOG.info(String.format("[SYNC REQUEST %s] Sync has started%n", request.getId()));