nativewindow: Add C++/Rust benchmarks

Test: atest nativewindow_buffer_benchmarks_rs nativewindow_buffer_benchmarks_cc
Merged-In: Ia2898439da46e57cf65e3d64030d98f052a694c6
Change-Id: Ib5aaa97f7130f1964824a2f6c8ca85d72d61ce4f
5 files changed