Set system server's class loader for wrap.system_server

Root Cause: systemServer's class path is not set
  after set wrap.system_server property, and restart system_server,
  it shows a java.lang.RuntimeException:
    Missing class when invoking static main com.android.server.SystemServer

Solution: Correctly pass and parse a passed classpath.

Bug: 34692265
Test: adb root && adb shell stop && adb shell setprop wrap.system_server logwrapper && adb shell start
Change-Id: Ia6707dc05fa627af6cc28360d26b894487a6eff1
2 files changed