[SF] Flag to use idlePeriod for VSync outlier calculation

Test: None
BUG: 346503493
BUG: 385059265
Flag: com.android.graphics.surfaceflinger.flags.vsync_predictor_recovery
Change-Id: Ibf0b0afadff480b02ed1f3e897e4789f3937385d

Author: ramindani

services/surfaceflinger/common/FlagManager.cpp

@@ -128,6 +128,7 @@ void FlagManager::dump(std::string& result) const {
     DUMP_ACONFIG_FLAG(graphite_renderengine_preview_rollout);
     DUMP_ACONFIG_FLAG(increase_missed_frame_jank_threshold);
     DUMP_ACONFIG_FLAG(refresh_rate_overlay_on_external_display);
+    DUMP_ACONFIG_FLAG(vsync_predictor_recovery);
 
     /// Trunk stable readonly flags ///
     /// IMPORTANT - please keep alphabetize to reduce merge conflicts
@@ -302,6 +303,7 @@ FLAG_MANAGER_ACONFIG_FLAG(adpf_gpu_sf, "")
 FLAG_MANAGER_ACONFIG_FLAG(adpf_native_session_manager, "");
 FLAG_MANAGER_ACONFIG_FLAG(graphite_renderengine_preview_rollout, "");
 FLAG_MANAGER_ACONFIG_FLAG(increase_missed_frame_jank_threshold, "");
+FLAG_MANAGER_ACONFIG_FLAG(vsync_predictor_recovery, "");
 
 /// Trunk stable server (R/W) flags from outside SurfaceFlinger ///
 FLAG_MANAGER_ACONFIG_FLAG_IMPORTED(adpf_use_fmq_channel, "", android::os)

services/surfaceflinger/common/include/common/FlagManager.h

@@ -63,6 +63,7 @@ class FlagManager {
     bool graphite_renderengine_preview_rollout() const;
     bool increase_missed_frame_jank_threshold() const;
     bool refresh_rate_overlay_on_external_display() const;
+    bool vsync_predictor_recovery() const;
 
     /// Trunk stable readonly flags ///
     /// IMPORTANT - please keep alphabetize to reduce merge conflicts

services/surfaceflinger/surfaceflinger_flags_new.aconfig

@@ -313,6 +313,16 @@ flag {
   }
 } # vrr_bugfix_dropped_frame
 
+flag {
+  name: "vsync_predictor_recovery"
+  namespace: "core_graphics"
+  description: "Recover the vsync predictor from bad vsync model"
+  bug: "385059265"
+  metadata {
+    purpose: PURPOSE_BUGFIX
+  }
+ } # vsync_predictor_recovery
+
 flag {
   name: "window_blur_kawase2"
   namespace: "core_graphics"