Convert sdk_library to use androidmk Dist

Reuse the generic Dist support instead of writing
custom mk rules for it. Use the new Tag support to
grab the classes.jar instead of the dexed jar.

Bug: 152618077
Test: m sdk dist
Change-Id: Id893d52cc24b66e6bd900b5062a59f3820000bcd
Merged-In: Id893d52cc24b66e6bd900b5062a59f3820000bcd
(cherry picked from commit 6bb8810c)