Updated .classpath of Android project to latest ADT 22 build tool compatibility.

Changes correspond to: https://groups.google.com/forum/?fromgroups#!msg/adt-dev/epOfZbKPFdk/RbR2VYNQ5_8J
Merge pull request #2591 from nicolasgramlich/patch-1

Updated .classpath of Android project to latest ADT 22 build tool compatibility.