Region::validate() cannot be called from addRectUnchecked()

addRectUnchecked() is allowed to be in an invalid state
temporarily.

Change-Id: I6f5162b5c49f378978c070a77abba35023fe918c

libs/ui/Region.cpp

@@ -114,10 +114,6 @@ void Region::addRectUnchecked(int l, int t, int r, int b)
     Rect rect(l,t,r,b);
     size_t where = mStorage.size() - 1;
     mStorage.insertAt(rect, where, 1);
-
-#if VALIDATE_REGIONS
-    validate(*this, "addRectUnchecked");
-#endif
 }
 
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