If continuous call requestRenderAndNotify before trigger old callback, old callback will lose, cause VRI will wait for SV's draw to finish forever not calling finishDraw. Bug: 253536483 Signed-off-by: Bowen Li <libowen1@xiaomi.corp-partner.google.com> Change-Id: I8d28ad2bfc077db6343e04d3f454cd06055f9b52