Always start jack server before first call to jack

Also install and update the server if necessary.

The target start-jack-server produces no file so it's always built.
Since the dependency is "order only", it doesn't cause force rebuilt of
jack targets after start-jack-server execution.

Bug: 25443108

Change-Id: I1608d87d186694d47307e00337b1905f0b8079c4
diff --git a/core/java.mk b/core/java.mk
index f9305df..a6ff6f5 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -652,14 +652,14 @@
         $(LOCAL_MODULE_MAKEFILE_DEP) $(JACK)
 
 ifeq ($(LOCAL_IS_STATIC_JAVA_LIBRARY),true)
-$(full_classes_jack): $(jack_all_deps)
+$(full_classes_jack): $(jack_all_deps) | setup-jack-server
 	@echo Building with Jack: $@
 	$(java-to-jack)
 
 else #LOCAL_IS_STATIC_JAVA_LIBRARY
 $(built_dex_intermediate): PRIVATE_CLASSES_JACK := $(full_classes_jack)
 
-$(built_dex_intermediate): $(jack_all_deps)
+$(built_dex_intermediate): $(jack_all_deps) | setup-jack-server
 	@echo Building with Jack: $@
 	$(jack-java-to-dex)
 
@@ -678,7 +678,7 @@
 $(noshrob_classes_jack): PRIVATE_JACK_INCREMENTAL_DIR :=
 endif
 $(noshrob_classes_jack): PRIVATE_JACK_PROGUARD_FLAGS :=
-$(noshrob_classes_jack): $(jack_all_deps)
+$(noshrob_classes_jack): $(jack_all_deps) | setup-jack-server
 	@echo Building with Jack: $@
 	$(java-to-jack)
 endif  # full_classes_jar is defined