Add logs to check if onLayout is ever not called.

Bug: 349929393
Test: Verified locally that the logs are shown in a bugreport.
Flag: EXEMPT logs
Change-Id: Ie5b759a2616456db9e232efcb0cfd21fdd4cc291

src/com/android/launcher3/ShortcutAndWidgetContainer.java

@@ -64,6 +64,7 @@ public class ShortcutAndWidgetContainer extends ViewGroup implements FolderIcon.
 
     private final ActivityContext mActivity;
     private boolean mInvertIfRtl = false;
+    public boolean mHasOnLayoutBeenCalled = false;
 
     @Nullable
     private TranslationProvider mTranslationProvider = null;
@@ -201,6 +202,7 @@ public class ShortcutAndWidgetContainer extends ViewGroup implements FolderIcon.
     @Override
     protected void onLayout(boolean changed, int l, int t, int r, int b) {
         Trace.beginSection("ShortcutAndWidgetConteiner#onLayout");
+        mHasOnLayoutBeenCalled = true; // b/349929393 - is the required call to onLayout not done?
         int count = getChildCount();
         for (int i = 0; i < count; i++) {
             final View child = getChildAt(i);