soong_zip: Add tests

Add test that cover basic command line usage of soong_zip.  -D
is not covered yet as the implementation will be replaced with
one that is also more easily testable in the next patch.

Bug: 116751500
Test: zip_test.go
Change-Id: I5a1bcee74ebc9cb3cf332c36f89bc12c0e807ad2
diff --git a/zip/cmd/main.go b/zip/cmd/main.go
index a2fbf41..1125602 100644
--- a/zip/cmd/main.go
+++ b/zip/cmd/main.go
@@ -187,7 +187,7 @@
 		os.Exit(1)
 	}
 
-	err := zip.Run(zip.ZipArgs{
+	err := zip.Zip(zip.ZipArgs{
 		FileArgs:                 fileArgsBuilder.FileArgs(),
 		OutputFilePath:           *out,
 		EmulateJar:               *emulateJar,