Log when qs height is set to 0 but probably shouldn't

These logs will be deleted in ~2 months, they're temporary to help debug when b/219589379 happens again

Bug: 219589379
Bug: 269742565
Test: just adding logs
Change-Id: I8c6b384fe35ed4cde1e9d381edab96f09c36f203

packages/SystemUI/src/com/android/systemui/shade/QuickSettingsController.java

@@ -194,7 +194,12 @@ public class QuickSettingsController {
     private boolean mAnimatingHiddenFromCollapsed;
     private boolean mVisible;
     private float mExpansionHeight;
+    /**
+     * QS height when QS expansion fraction is 0 so when QS is collapsed. That state doesn't really
+     * exist for split shade so currently this value is always 0 then.
+     */
     private int mMinExpansionHeight;
+    /** QS height when QS expansion fraction is 1 so qs is fully expanded */
     private int mMaxExpansionHeight;
     /** Expansion fraction of the notification shade */
     private float mShadeExpandedFraction;
@@ -693,6 +698,7 @@ public class QuickSettingsController {
 
     /** update Qs height state */
     public void setExpansionHeight(float height) {
+        checkCorrectSplitShadeState(height);
         int maxHeight = getMaxExpansionHeight();
         height = Math.min(Math.max(
                 height, getMinExpansionHeight()), maxHeight);
@@ -714,6 +720,14 @@ public class QuickSettingsController {
         }
     }
 
+    /** TODO(b/269742565) Remove this logging */
+    private void checkCorrectSplitShadeState(float height) {
+        if (mSplitShadeEnabled && height == 0
+                && mPanelViewControllerLazy.get().isShadeFullyOpen()) {
+            Log.wtfStack(TAG, "qsExpansion set to 0 while split shade is expanding or open");
+        }
+    }
+
     /** */
     public void setHeightOverrideToDesiredHeight() {
         if (isSizeChangeAnimationRunning() && isQsFragmentCreated()) {