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: Google Nexus 7
Android version: JellyBean 4.2.2

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

Original android.jar can be downloaded here
https://dl-ssl.google.com/Android/repository/android-17_r03.zip

Extract the archive and find android.jar