Track change to private libcore data structure.

Bug: 15476051

(cherry picked from commit d47acaeecd)

Change-Id: Iac79ce3602282a2780dd895995f42ab03f346ad4

tools/layoutlib/bridge/src/libcore/icu/ICU_Delegate.java

@@ -223,7 +223,7 @@ public class ICU_Delegate {
         result.decimalSeparator = '.';
         result.groupingSeparator = ',';
         result.patternSeparator = ' ';
-        result.percent = '%';
+        result.percent = "%";
         result.perMill = '\u2030';
         result.monetarySeparator = ' ';
         result.minusSign = "-";