Change surfacefliger properties scopes to public

For sysprop_library, System scope and Public scope are identical from
now on, and only Public or Internal scope are suppose to be used. This
changes existing system scopes to public, and has no effect on code
level.

Bug: 131637873
Test: mma
Change-Id: Ib285432d66fbe9ca99d94edb41b424937f04b26d