Move GPU related ftrace events permissions set to late-fs

Moved from 'on late-init' as permission was not set correctly. Seems as GPU driver registers them after 'late-init'.

Bug: 404439743

Test: adb shell ls -la /sys/kernel/tracing/events/power/gpu_frequency/enable

Flag: EXEMPT bugfix

Change-Id: I0630c5f4f33ac4b783d46886c9631f77e9a02b9c