Resolved cache returning 'null' incorrectly due to not detecting whether cached item was a stub or not.
Merge branch 'jb-mr1-release-openpdroid-devel' of github:wsot/platform_frameworks_base; branch 'jb-mr1-release-openpdroid-devel' of github:OpenPDroid/platform_frameworks_base into jb-mr1-release-openpdroid-devel