Add sdk_version property to cc_genrule

This is a partial cherry-pick of Ic30ab6b844684bfc3e8ece5a1913980d5fbf8de2
so that modules with sdk_version properties added to cc_genrules can be
backported to rvc-dev.  The property does nothing for now.

Bug: 149591340
Test: treehugger
Merged-In: Ic30ab6b844684bfc3e8ece5a1913980d5fbf8de2
Change-Id: I7be8efe8880130db10fb517b12606100c85a1411