Mark updatable APEXes as updatable: true so that they are opted-out from
optimizations that make sense only for non-updatable modules; such as
symlinking to the libs in the system partition.
Bug: 149805758
Test: m and check that there is no symlink from the APEX to the system
partition.
Change-Id: Idb55300a60a261c7bb6359439ed220ff51fcf06c
477b4734f5