Do not require the presence of a manifest for library projects.

Be sure to warn that this is the behavior we are falling back to.
Allow manifest to be specified from @Config annotation.
Merge branch 'JakeWharton-jw/library-projects'

* JakeWharton-jw/library-projects:
  Allow manifest to be specified from @Config annotation.
  Do not require the presence of a manifest for library projects.
Use proper android NS for attribute lookups.
Make checkCallingPermissions and getCallingOrSelfPermission work just like checkPermission
Merge branch 'master' of https://github.com/pivotal/robolectric
Added ability to deny previously granted permissions in ContextWrapper
Move permission tracking into ShadowApplication.
Add @Implementation to ShadowApplication.checkPermission()