add sha256 to art-host-tests zip to lower rbe upload overhead

Avoid a cas unzip/upload by using the soong_zip option

Change-Id: I4ef8571a43ccf49d01e876605759e82f8e87dbc5
Test: presubmit
Bug: 286959075
diff --git a/core/tasks/art-host-tests.mk b/core/tasks/art-host-tests.mk
index ff9eb09..c95f6e7 100644
--- a/core/tasks/art-host-tests.mk
+++ b/core/tasks/art-host-tests.mk
@@ -50,7 +50,8 @@
 	grep $(TARGET_OUT_TESTCASES) $(PRIVATE_INTERMEDIATES_DIR)/list > $(PRIVATE_INTERMEDIATES_DIR)/target.list || true
 	$(hide) $(SOONG_ZIP) -d -o $@ -P host -C $(HOST_OUT) -l $(PRIVATE_INTERMEDIATES_DIR)/host.list \
 	  -P target -C $(PRODUCT_OUT) -l $(PRIVATE_INTERMEDIATES_DIR)/target.list \
-	  -P host/testcases -C $(HOST_OUT) -l $(PRIVATE_INTERMEDIATES_DIR)/shared-libs.list
+	  -P host/testcases -C $(HOST_OUT) -l $(PRIVATE_INTERMEDIATES_DIR)/shared-libs.list \
+	  -sha256
 	grep -e .*\\.config$$ $(PRIVATE_INTERMEDIATES_DIR)/host.list > $(PRIVATE_INTERMEDIATES_DIR)/host-test-configs.list || true
 	grep -e .*\\.config$$ $(PRIVATE_INTERMEDIATES_DIR)/target.list > $(PRIVATE_INTERMEDIATES_DIR)/target-test-configs.list || true
 	$(hide) $(SOONG_ZIP) -d -o $(PRIVATE_art_host_tests_configs_zip) \