Put com.android.location.provider before services on the system server classpath.

Test: aosp_walleye-userdebug boots and there are no messages in the
  logcat regarding class loader context mismatch:

    $ adb logcat | grep 'mismatch'
    # empty

Bug: 147017252
Change-Id: I338685b9cf71681b5ca0c541752948934b656b46

target/product/media_system.mk

@@ -50,9 +50,9 @@ endif
 
 # The order here is the same order they end up on the classpath, so it matters.
 PRODUCT_SYSTEM_SERVER_JARS := \
+    com.android.location.provider \
     services \
     ethernet-service \
-    com.android.location.provider \
     service-jobscheduler \
     service-blobstore