Bug 5250788: Fix memory consumption issues in TextPaint.

The increased size array was discarded in set. Reuse it instead if
possible to avoid more size increases later.

Change-Id: I9ab95ed0f4d4613dd1e28f02894bb19ecee7df41

Author: Gilles Debunne

core/java/android/text/TextPaint.java

@@ -72,8 +72,15 @@ public void set(TextPaint tp) {
         linkColor = tp.linkColor;
         drawableState = tp.drawableState;
         density = tp.density;
-        underlineColors = tp.underlineColors;
-        underlineThicknesses = tp.underlineThicknesses;
+
+        if (tp.underlineColors != null) {
+            if (underlineColors == null || underlineColors.length < tp.underlineCount) {
+                underlineColors = new int[tp.underlineCount];
+                underlineThicknesses = new float[tp.underlineCount];
+            }
+            System.arraycopy(tp.underlineColors, 0, underlineColors, 0, tp.underlineCount);
+            System.arraycopy(tp.underlineThicknesses, 0, underlineThicknesses, 0, tp.underlineCount);
+        }
         underlineCount = tp.underlineCount;
     }