When we insert a timezone, avoid re-insert of existing aliases.
treea9310321c5323c0c08b504ee10afa62108b86a5f
-rwxr-xr-x 402 .gitignore
-rw-r--r-- 409 Android.mk
-rwxr-xr-x 14029 AndroidManifest.xml
-rw-r--r-- 51 build.properties
-rw-r--r-- 6002 build.xml
drwxr-xr-x - config
drwxr-xr-x - design
-rw-r--r-- 109 lint.xml
drwxr-xr-x - po
-rw-r--r-- 1493 proguard.cfg
-rw-r--r-- 361 project.properties
drwxr-xr-x - res
drwxr-xr-x - src
drwxr-xr-x - timezones