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: I218f8c9ff6b397fe2301e33f2741b4a633e7a76c

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 \