Enable profiling for system server for userdebug|eng

Only for these two configurations since selinux permissions only
allow system_server to access profiles in these cases.

Motivation is to allow collecting profiles for improving RAM and
performance for preopt.

Setting the property dalvik.vm.profilesystemserver to true is required
to enable the collection of profiles for system server.

Test: device boots

Bug: 34927277
Bug: 36457259

Change-Id: Icbba6dafe376fd9c6c3d0c7feba7f64009f7c2c3