update build rules to use /data/local/tests/unrestricted

... for native tests. This new location has the appropriate
settings for debuggerd to generate valid backtraces in case
of test binary crash.

Bug: 167308193
Bug: 199904562
Test: compile
Change-Id: Ic106011a79f0aec86896b305616cf5590ab2eb2d
diff --git a/cc/test.go b/cc/test.go
index 047a69e..3934784 100644
--- a/cc/test.go
+++ b/cc/test.go
@@ -357,8 +357,7 @@
 }
 
 func (test *testBinary) install(ctx ModuleContext, file android.Path) {
-	// TODO: (b/167308193) Switch to /data/local/tests/unrestricted as the default install base.
-	testInstallBase := "/data/local/tmp"
+	testInstallBase := "/data/local/tests/unrestricted"
 	if ctx.inVendor() || ctx.useVndk() {
 		testInstallBase = "/data/local/tests/vendor"
 	}