fix(perf): Make FirstDrawDoneListener cleanup OnGlobalLayoutListener after use

The OnGlobalLayoutListener registered in onDraw() to defer removal of the
OnDrawListener was never itself removed. In single-Activity apps this causes
an unbounded per-navigation leak on the ViewTreeObserver, accumulating one
listener per registerForNextDraw call.

Make the OnGlobalLayoutListener remove itself after firing.

Author: romtsn

firebase-perf/src/main/java/com/google/firebase/perf/util/FirstDrawDoneListener.java

@@ -73,7 +73,14 @@ public void onDraw() {
     // OnDrawListeners cannot be removed within onDraw, so we remove it with a
     // GlobalLayoutListener
     view.getViewTreeObserver()
-        .addOnGlobalLayoutListener(() -> view.getViewTreeObserver().removeOnDrawListener(this));
+        .addOnGlobalLayoutListener(
+            new ViewTreeObserver.OnGlobalLayoutListener() {
+              @Override
+              public void onGlobalLayout() {
+                view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
+                view.getViewTreeObserver().removeOnDrawListener(FirstDrawDoneListener.this);
+              }
+            });
     mainThreadHandler.postAtFrontOfQueue(callback);
   }