Remove unneed jar files from the system partition

Fix: 170967644
Test: boot
Test: Make sure the following jar files are removed
$OUT/system/framework/service-blobstore.jar
$OUT/system/framework/service-jobscheduler.jar

Test: But the following *.so are kept.
$OUT/system/lib64/libalarm_jni.so
$OUT/system/lib/libalarm_jni.so

Change-Id: Ia5351d9d3b1dda7bf96e95bbaad171cd8c3b49fc