Reduce the propagation of LOCAL_DEX_PREOPT := nostripping

nostripping causes confusing double negatives, allow nostripping
in LOCAL_DEX_PREOPT and DEFAULT_DEX_PREOPT, but convert to
LOCAL_STRIP_DEX outside of dex_preopt_odex_install.mk.

Test: m checkbuild
Change-Id: I996e9258ce20c394900d9fe937d638bc2ab8589d
diff --git a/core/java_library.mk b/core/java_library.mk
index 5716f4c..e4e51d8 100644
--- a/core/java_library.mk
+++ b/core/java_library.mk
@@ -96,7 +96,7 @@
 	@echo "Dexpreopt Jar: $(PRIVATE_MODULE) ($@)"
 	$(call dexpreopt-one-file,$<,$@)
 
-$(eval $(call dexpreopt-copy-jar,$(common_javalib.jar),$(LOCAL_BUILT_MODULE),$(LOCAL_DEX_PREOPT)))
+$(eval $(call dexpreopt-copy-jar,$(common_javalib.jar),$(LOCAL_BUILT_MODULE),$(LOCAL_STRIP_DEX)))
 
 endif # ! boot jar