Account for refresh rate in sf adpf hint session rate limiter

Currently, the SurfaceFlinger hint session rate limiter will send hints
after 80ms of inactivity regardless of refresh rate, which can lead to
issues at lower rates (eg: 30fps) where we skip the window that we
should send the hint in and go stale. This patch addresses that
oversight.

Bug: b/240473968
Test: manual
Change-Id: I27ce9229537e445f202e948ab201cc0242882667