SF: fix buffer stuffing classification

Keep track of the expected present time of SF when classifying buffer
staffing. Buffer stuffing is classified when:
1. The current frame was due to present on the previous SF frame; and
2. The current frame was ready by the time SF tried to latch the previous frame; and
3. SF latched a frame from this layer on the previous frame

Test: manual
Bug: 417070677
Flag: com.android.graphics.surfaceflinger.flags.buffer_stuffing_fix
Change-Id: I319b77376e3765388f3360513191479b041cb21b