Upgraded Guava to unmodified jdk5-backport-v17.0-post

This simply copies the Guava source for jdk5-backport-v17.0-post
straight from the github repository into this one.

See https://github.com/google/guava.git

Additional commits will be made which will allow this to compile
on Android.

BUG=19672715
Change-Id: If822daced0fc352f01bf9ecac1e994da08358f72
50 files changed