Add subdir under frameworks/base for code ported from icu4j.

Change-Id: I6c9fa6dac1f80bbaf8c80b9e0900f4e628ff596f
diff --git a/core/pathmap.mk b/core/pathmap.mk
index 25de0ea..2c91e48 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -89,6 +89,7 @@
 	    wifi \
 	    vpn \
 	    keystore \
+	    icu4j \
 	 )
 
 #