More temporary logging to diagnose testPendingWidget_autoRestored

And waiting to loader to finish to improve determinism.

Bug: 117332845
Test: running Launcher
Change-Id: Icdfce969b61f8ceb952a2715037783458da4d4c4
diff --git a/src/com/android/launcher3/LauncherModel.java b/src/com/android/launcher3/LauncherModel.java
index 316e23f..5424d97 100644
--- a/src/com/android/launcher3/LauncherModel.java
+++ b/src/com/android/launcher3/LauncherModel.java
@@ -563,6 +563,11 @@
             synchronized (mLock) {
                 // Everything loaded bind the data.
                 mModelLoaded = true;
+                if (com.android.launcher3.Utilities.IS_RUNNING_IN_TEST_HARNESS
+                        && com.android.launcher3.Utilities.IS_DEBUG_DEVICE) {
+                    android.util.Log.d("b/117332845",
+                            android.util.Log.getStackTraceString(new Throwable()));
+                }
             }
         }