Merge changes I38145a51,Iac1fdabc,I90f18181,I76b979dd,Id2e17923, ...
* changes:
ApiLint: Add operator keyword and property parsing
ApiLint: Add Kotlin-style type support
ApiLint: Performance improvements for verification
ApiLint: Performance improvements for 2.0 signature format parsing
ApiLint: Allow parsing 2.0 API signature files
apilint: Fix API lint issues 2/2
apilint: Fix API lint issues
API Lint: Add support for base current.txt
Guide towards Context.createPackageContextAsUser().
Moar lint rulez!
Update lint rules for graphics/text package layering
Handle new current.txt format.
Extend lint script to emit API statistics.