ICU 49.2 upgrade.

(cherry-pick of 151192e2fa08cb1b7064e0ed0af6209174e7968d.)

Change-Id: I493390846fc2f7fb74194dfd9a3c8d624516858b
Merge "ICU 49.2 upgrade."
am e2c775e0: Merge "ICU 49.2 upgrade."

* commit 'e2c775e00b7f86c1c6b88788616a6217a673dd7c':
  ICU 49.2 upgrade.
Merge tag 'android-4.3.1_r1' into HEAD

Android 4.3.1 Release 1