framework.jar file was combined with android.jar from /<SDK location>/platforms/android-X, where X is current API level.

framework.jar location: /system/framework/framework.jar
Real device: Sony Xperia S
Android version: Gingerbread 2.3.7

========== BACKUP ==========

Original android.jar can be downloaded here
https://dl-ssl.google.com/Android/repository/android-2.3.3_r02-linux.zip

Extract the archive and find android.jar