Add phenotype property for enabling profiling of boot class path

If specified, does the same behavior as the dalvik.vm.profilebootimage
property used to do. The new property is called profilebootclasspath
and is in the runtime_native_boot namespace.

Added logic to pass down Xjitsaveprofilinginfo if profilebootclasspath
is specified.

Bug: 138851258
Test: adb shell setprop dalvik.vm.profilebootclasspath true
Test: look at logcat to verify the right options are passed down

Change-Id: I3e2ec37931a6f9239c5d0fa9fcaea61637061ac1