In Android proof-of-concept application, changed namespaces in produced system characteristics file due to newer versions of ovaldi not liking the
default namespace of "x".
In Android schemas and proof-of-concept application, split cpu_abi into cpu_abi
and cpu_abi2 to reflect Android API and the different definitions of cpu_abi
and cpu_abi2 as expressed by the Android Compatibility Definition Document
(section 3.3.1 of http://static.googleusercontent.com/media/source.android.com/en/us/compatibility/android-cdd.pdf).
Merge pull request #130 from mpeck12/master

Minor updates to Android schemas and proof-of-concept app