Add projects required to use droiddoc

droiddoc is required to build the stub for the pseudo SDK
'core_current'. Some modules (mostly from external) are now built using
core_current. This CL adds projects required to run droiddoc.

Test: art/tools/buildbot-build.sh --host
Change-Id: I1405076a2aed6d0136ab6bf0aa15f20909867b5b
1 file changed