removed versionCode and versionName from library manifest merging.

ability to set versionCode and versionName for libraries has been
removed in the variant API as it made no sense for aar files.
removed setting the versionCode and versionName from the library
manifest merging.

Test: Existing.
Bug: N/A
Change-Id: Id2cb3a7291345c14659e3ee1cb7dd517a933344b
5 files changed