Add cc_defaults VtsHalTargetTestDefaults

Makes it easier to control how vts tests link to system libs.
Also, removes a lot of redundant lines in test make rules.

Bug: 64040096
Test: compiles
Merged-In: I10796e3fa8f61a307dbb7edace537a96ec83bea7
Change-Id: I10796e3fa8f61a307dbb7edace537a96ec83bea7
(cherry picked from commit 0b19836c)