+ force arm (over thumb) mode for 32-bit builds
-O2 improves performance ~30-40% over the default -Oz depending on the
resolution; this is similar to what is done for vp9 which uses -O3.
PiperOrigin-RevId: 290318121
Currently, ndk cpu-features is being used.
This is now deprecated and google open-source
cpu_features library is recommended.
PiperOrigin-RevId: 273987647