Add jobscheduler-service.jar to system server class path

This is part of the effort to make jobscheduler a mainline apex module.

Bug: 137763703
Test: build and boot
Test: atest CtsJobSchedulerTestCases
Change-Id: I9ed53bdb5ce5206c5a1ffee387d9c034c6b75001

target/product/base_system.mk

@@ -112,6 +112,7 @@ PRODUCT_PACKAGES += \
     iptables \
     ip-up-vpn \
     javax.obex \
+    jobscheduler-service \
     keystore \
     ld.config.txt \
     ld.mc \

target/product/media_system.mk

@@ -52,6 +52,7 @@ endif
 # The order here is the same order they end up on the classpath, so it matters.
 PRODUCT_SYSTEM_SERVER_JARS := \
     services \
+    jobscheduler-service \
     ethernet-service \
     wifi-service \
     com.android.location.provider \