Add phenotype property for profiling system server

Added the property profilesystemserver in the RUNTIME_NATIVE_BOOT
namespace. This property is overrides the system one if it is
present.

Bug: 138851258
Test: set the property manually and verify that system server is started
Test: with profiling

Change-Id: Ifd69530e52a717a381b3f91b15a74329614906f2