I downloaded the android Email app source code [version 2.2] from here. I deleted the .classpath and .project file so that I could import an existing android project. Everything
I faced the same issue with Email. I fixed the issue, by adding the following jars into the build path and thus, all the errors were resolved.
../out/target/common/obj/APPS/Email_intermediates/classes.jar
../out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/classes.jar
But you need to make the Application build using the platform.