This makes the filenames of the disted artifacts (api txts and stubs)
match the module name of the modules they're from. This matches the
naming scheme used by java_sdk_library, which should make the future
transition to this build rule easier.
Bug: 149293194
Test: lunch sdk_phone_armv7 && m sdk dist && find out/dist/apistubs
Change-Id: I076f30931bf2524d57703873cd7de25b3f23b457
Merged-In: I076f30931bf2524d57703873cd7de25b3f23b457
(cherry picked from commit 8bf731c0fcbde688e9f5ffaca297f5b350919b77)
fe45ab4399