The candidate of presnet fence is switched dynamically between front/back buffer, based on current design, it will introudce in big side effect especially for app launching, app resume cases, sometimes the timestamp of the candidate fence is not signaled, but the other candidate has fence signaled already. Then previous logic is not well handled to pick up theright presnet fence candidate. Then frame is skiped.

This change is to use the legacy logic to pick up fence candidate. It can avoid such abnormal frame skip behavior.

Change-Id: I055942d9ae9ac6c96eba403aa4bc1979cf128ce8
CRs-Fixed: 3035044
Signed-off-by: Chenyang Zhong <zhongcy95@gmail.com>
Signed-off-by: Simão Gomes Viana <devel@superboring.dev>