android_test.go already sets up a global buildDir, no need to create
one in each test.
Test: All soong tests
Change-Id: Ib85cbf78c604ad3cef64aa00b6bd812a81496e9e
Adds a package module type with a default_visibility property. The
package module type can only be specified once per package.
Bug: 133290645
Test: m droid
Change-Id: Ibb2fb499c9ea88ecaa662d3cd2cbde478e4b9a4b