Add a placeholder EXTRA_OPTIONS to inject more tradefed options

Simply remove the placeholder in makefiles, for now I am
not sure we need to support this in makefiles at all.

Test: call the sed method
Bug: 124024827
Change-Id: Iae78ae86c20c5da6b7314b749f54983a312c4a7d
diff --git a/core/autogen_test_config.mk b/core/autogen_test_config.mk
index a01d80f..6d75132 100644
--- a/core/autogen_test_config.mk
+++ b/core/autogen_test_config.mk
@@ -36,7 +36,7 @@
 $(autogen_test_config_file): PRIVATE_MODULE_NAME := $(LOCAL_MODULE)
 $(autogen_test_config_file) : $(autogen_test_config_template)
 	@echo "Auto generating test config $(notdir $@)"
-	$(hide) sed 's&{MODULE}&$(PRIVATE_MODULE_NAME)&g' $< > $@
+	$(hide) sed 's&{MODULE}&$(PRIVATE_MODULE_NAME)&g;s&{EXTRA_OPTIONS}&&g' $< > $@
 my_auto_generate_config := true
 else
 # Auto generating test config file for instrumentation test