Add support for converting logtags files to source files. Each
.logtags file is converted to a .java file, but only after all
.logtags files have been combined into a merged text file by
the logtagsSingleton.
Change-Id: I375d82874029bd26a7c528e46add2a638ba123f9
Add support for aidl files listed in srcs for java builds, and
an aidl_preprocess module type for framework and sdk aidls.
Change-Id: I3aa537f4483822e5b534c74d0b35f13a938f8947